I'm in the same situation, what did you end up doing? do you have any recommendations? going back to global stock does not support dual sim ....:emoji_disappointed:.
EDIT: India ROM supports dual sim in STOCK global version
Found a solution: type on the dial *#*#4636#*#*
choose sim and select Preferred Network Type: NR/LTE/GSM/WCDMA (includes 5G)
If you don't want 5g, Choose an option without the NR