To the discussion of connection, I think it’s worth remembering that horses are as individual and variant as people. Some can be indiscriminately social/engaging/outgoing (and some of those can be that way to an overwhelming degree). Others are more reserved, but still willing to be affectionate/receive affection. Still others are more brusque and workmanlike and would rather have nothing to do with being pampered and fussed over.
If any horse falls into the second category, it can take longer to “bond” with them. That was my gelding. He was pleasant enough (and always modestly interested in people if there was a promise of food) but his attention/engagement was generally lackluster with most people. He had his favorites (my mother, oh god. She was his favorite person…) but even if someone was a “treat dispenser” for years, that didn’t really mean he cared for them beyond oh hey, treats are cool.
It took me a while to really click with him - probably 6-9 months? That said, we absolutely did click. It just took time.
(When I was shopping it really came down to him and one other - the other was certainly friendlier and more pleasant to interact with on the ground just because he was more engaging. I ended up going with the gelding I purchased because of some characteristics displayed under saddle - he was tremendously good minded. I don’t regret the choice, and have learned from the experience that much like people, some horses can take quite some time to get to know.)