Hey Wild Catholic, I apologize if I missed some information but I wanted to skip over any digressions from the main topic. Okay my response looks long but a lot of it is outside quotes!
I don’t understand why you say your mom likes Pope Francis for the wrong reasons? I mean, who am I to decide what the right reasons are. I feel this Pope has a chance to really draw weaker Catholics back into the church.
We have horseblinders on when it comes to the issues I call the “Sex issues” contraception, abortion, gay marriage, etc. People who are suffering are being ignored because we are only thinking about sexual sins. The planet is dying, the imprisoned experience grave injustices, and the poor are starving. I am devastated that a woman is terminating her pregnancy, but maybe if I cared more about her life that lead to that decision she would never have thought to consider it! People assume the Catholic Church is in line with all conservative political ideology, which is far from the truth. In America at least, we are creating idolators by being so narrowly microscopically focused on sex! Your mom’s feelings are pretty fair.
So my advice, find the priest and church community that are more broad minded, and focus your mom on Church values she does agree with. The rest can come later. Feeling a lack of community is the biggest issue for those who lack intense faith. Thus, helping her find a sense of belonging and acceptance is your biggest priority. Being the only Catholic in your family, you may understand this. Sneak a green scapula into her room or purse and pray for her every day. As for switching parishes, keep asking a higher authority to give you permission or to have a serious talk with that priest. He is obviously not reaching his sheep, and I am sure he wants to do the best job he can. He might need help with his approach.
I know you know this, but don’t be so presumptuous as to inform someone else on the status of their own soul. This would drive anyway away.
Your mom reminds me of my ex, who converted to Catholicism in a hope I would take him back, and when I didn’t converted again to his new girlfriend’s religion. Staying in the church means nothing for her soul if her heart isn’t in it. She cannot fully convert for you or for her husband; she can only do it for God. You can’t force her heart. It’s sad, and I know that you want your mother to go to heaven, but you really don’t know if she won’t, because that isn’t your call to make.
Okay, my piece is done. If you have questions about how to come to terms with it and maintain a good relationship with her if she does leave, that’s a whole different answer. My sympathies for the pain this must have caused you

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Sorry it’s long, but relevant quotes from Pope Francis follow from an article I will try to
link. No, it’s not from the catechesis exactly but it is from the highest Catholic authority alive right now. I really hope they help you.
“if a …person is of good will and is in search of God, I am no one to judge. By saying this, I said what the catechism says. Religion has the right to express its opinion in the service of the people, but God in creation has set us free: it is not possible to interfere spiritually in the life of a person.”
"We cannot insist only on issues related to abortion, gay marriage and the use of contraceptive methods. This is not possible. I have not spoken much about these things, and I was reprimanded for that. But when we speak about these issues, we have to talk about them in a context. The teaching of the church, for that matter, is clear and I am a son of the church, but it is not necessary to talk about these issues all the time…
…I say this also thinking about the preaching and content of our preaching. A beautiful homily, a genuine sermon must begin with the first proclamation, with the proclamation of salvation. There is nothing more solid, deep and sure than this proclamation. Then you have to do catechesis. Then you can draw even a moral consequence. But the proclamation of the saving love of God comes before moral and religious imperatives. Today sometimes it seems that the opposite order is prevailing. The homily is the touchstone to measure the pastor’s proximity and ability to meet his people, because those who preach must recognize the heart of their community and must be able to see where the desire for God is lively and ardent. The message of the Gospel, therefore, is not to be reduced to some aspects that, although relevant, on their own do not show the heart of the message of Jesus Christ."