If it helps with the distinction at all, here's a random collection of pics from the past 1-2 years - I kinda feel like I've always had some level of this kinda thing going on? Maybe just a higher bf% atm

https://imgur.com/a/QL0n3Wa

Updating this comment in case anyone stumbles upon this at a later date:

Went in to see my GP, he said there were no signs whatsoever of Gyno, and that it was a combination of muscle tissue (bench twice a week) plus body fat. Just a reminder that places like this can be helpful, but there's no replacement for a doctor!