In Europe, try this :
Open Hicare, update Hicare, agree to terms of system update, download and update to b370 or b 371.
I can recommend Watch Face Minimal & Elegant app.
Using it myself, lots of presets, ready made faces and lots of options to adjust for your pleasure.
worked for VNS-L31C432B160 > VNS-L31C432B370, (dual sim).
Took a while.
As for 1,5 hour of using everything seems to be working.
Bluetooth - calls and sending attachment ok.
Both sims ok.
Camera, flash etc ok.
Bluetooth works ok with my Hyundai, calls and music.
I'm not sure on which version of these ports, as I tried like 50, but allowing hdr as default solved taking/saving pictures.