Short answer; there is no way to see your Pinned Tabs while using Tab Groups
I think it sucks. I pin tabs like calendar, todo lists, instant messages, etc. These are exactly the things that I want to be able to access from anywhere and everywhere.
Overall I think that Safari’s approach to the window/pinned tabs/tab groups/tabs hierarchy is very different compared to other browsers… but not in any good ways.
I just switched back to using Safari after Brave was crashing on me continuously, and I found this to be a noticeable shortcoming straight away.
I went Googling and found these other discussions which suggest that Apple sort of considers Tab Groups and Pinned Tabs to be overlapping features:
Bad call imo, hope they consider changing how the pinned tabs work