All the Eastern Churches to my knowledge have fairly strict fasting rules, but also Latin Catholics are free to fast whenever they want. Plenty of Latin Catholics abstain every Friday, quite a few traditional Catholics fast from midnight till morning Mass, and I know quite a few Latin Catholics who engage in some type of regular fasting for various devotions. Most of them do not tell people they are fasting because then it’s like praying on the street corner - you’re supposed to fast in private.
I can understand why the Latin Catholic church relaxed the fasting rule because of the number of threads we get on here, especially in Lent, about can I eat this or that and how much can I eat and I ate a sandwich so am I in mortal sin, etc. People don’t understand “how to fast”, they are only concerned with whether taking an extra bite of food put them into mortal sin. The Eastern fast as I understand it has some rules, but a lot is left up to the individual and the sin part is de-emphasized in keeping with their general non-legalistic approach. They are also encouraged to discuss with their priest, and seem to have enough priests that it is realistic for a person to approach them (whereas getting a priest on the line for anything other than an emergency in the Latin Church can be challenging). The Latin Church likely doesn’t have enough priests, nor a good tradition of educating people about fasting, to try to do that. Those of us called to fast are able to seek out and discern our own resources - certain online priests are sponsoring fasting days and fasting periods all the time if one wants to join.
So if you want to fast, have at it. Nothing’s stopping you just because the Latin Church doesn’t order you to do it.