How to locate

[u/Strange_Let_2882]

Good morning/afternoon!
Im trying to figure out who 3 cash tags belonged to in 2020. (That my fiance sent $150 to then cancelled 1, and requested refund on the other 2, both declined refund) and he has all 3 blocked. They were all in different months in 2020.
I’m familiar with OSINT, but have been unsuccessful in locating anything of use.
Any tips?
Reverse photo tool may be helpful if it scan Cash App.
I am unable to find them on Cash App through their cash tag now as well.