I gave up on Samsung getting BP approval. When I got the GW4 classic, I hacked it using this post on the xda forums. Been using it ever since.
Hello Everyone, I hope you all are fine... ~~~ WearOS WATCHES ONLY ~~~ ~~~ FEATURES, BUGS & FUTURE WORKS~~~ ONE UI8 WATCH: SHM MOD IS BEING KILLED BY GOOGLE AND SAMSUNG, DO NOT UPDATE THE WATCH TO ONE UI8 TILL I FIGURE OUT IF THIS IS FIXABLE...
xdaforums.com
The developer has automated the install and update process next level. When I set up my 7 ultra, I restored it from a GW6 classic backup with the BP setup installed. Didn't have to do anything except calibrate the BP app with my BP cuff.
Go check it out. Buy the guy a coffee!