Hello there and thanks for bringing this up !
Please take a look at your community profile (you click on your own pic/avatar image on the top right side of the Community page), that will bring you to your own Profile page , with a URL looking like this: https://community.ptc.com/t5/user/viewprofilepage/user-id/<YOUR-OWN-ID-NUMBER> .
There you will see your own information, one of the sections being "Photos", where all uploaded images are stored (since we moved to this Community Platform last year). Images that were part of Community posts in our previous Platform (jive) do not have their own gallery but should still be embedded in their related posts.
Hope it helps.