That is shocking

I have never been in a church whether it be Methodist, Baptist or Pentecostal without a Altar/Prayer Bench

Are you sure it was a Unitarian Church or something like that you were in rather than a normal Protestant Church?
WP
I don’t know where you are located since you don’t even indicate which state or even region, but I have to assume you are in the deep south.
My grandmother used to take me to her Church of the Nazarene congregation, they did have squatting (not kneeling, they squatted), benches they did call them “altars” even tho they weren’t, as a matter of fact they had no altars at all, they never to my knowledge had comunion, they had a pulpit right in the center-front where the REAL altar belongs. They and a holiness, pentecostal church of God were the only churches that I ever heard of or saw that had the squatting benches. I know exactly what you are talking about Gramma’s church had them. These squatting benches were way too low to the floor to be able to really kneel at them, they kind of squatted and laid across them.
These people would sqaut at thier benches and pray for very long times, I remember they got very emotional there, they had boxes of kleenexes around their benches for when they broke into tears.
The Methodists, a lot of Catholics, Episcopalians, and Lutherans had proper communion rails, where people kneel, really kneel upright to recieve Holy Communion. These communion rails are not like the sqautting benches at all, they are too tall and too narrow to sprawl around and over them. A lot of Methodists I have seen their churches have little rails with holes drilled into them to put their little shot glasses into.
Oh and yes, the squatting benches were wide enough and made so that people could squat around them, and lay on them from both sides. Proper communion rails are only open for people to kneel at one side, the other side is for the Priest or communion ministers to go down to give Holy Communion.