One thought I've had is that it has to do with your level of engangement. If like me you doesn't really use social media for more than a few minutes a day (in my case I count Snapchat and YouTube Shorts, because that's what I have), then you start seeing some a lot of boobs.

It seems like the algorithm panics, because you don't engange with anything much, or because your interests shifts to often and it can't deal with it. So it falls back to boobs.

There's also a sad trend of assuming that because you're into lifting, your also misogynistic. The more you engange with fitness content, even if it's training programs or how to correctly do certain exercises, platforms like YouTube will start flinging misogynistic content at you and it's incredibly hard to remove.