Try using NetMonster app to pin NR (5g) only option (I also use this app) , this setting will pin 5g network only so you can use unlimited 5g data benefits just like I do . But I can't guarantee the speed of 5g as samsung 5g coverage inside closed ro...

Yep me too . Especially while using 5g initially i was getting alot better battery life hope it will be fixed with one ui 8