Are there any ports to forward?

Bueller?

yes the same i keep getting 39 like its frozen even in all servers im capped  both me and my wife everyone on enemy team in every match has higher ping and i have gaming router with merlin , cake etc for best latency possible, in other games my ping is as low as 10 but "ONLY" in battlefield 6 is it 39 to 50 and if i pick custom maps it jumps to over 100

Battlefield 6 runs ping on 60hz (every 60ms it upload everyones actions playing). Everyone playing with a ping of 60 or under registers at the same time. It upload everybody's action to the server that has 60 or under ping at the same time. So 50 is the same as 8. This the from my research online so double check it but I just looked at it. 

This is not correct.

My games where I have 18 ping in BF6 are much more smooth than the games where it gives me 58.

"A 60Hz Battlefield server doesn't make pings under 60ms irrelevant—lower ping like 18ms is still meaningfully better than 50ms for hit detection. Tick rate (60Hz = updates every ~16ms) handles server simulation, but ping is your round-trip delay to the server; 18ms means your shots arrive ~32ms faster, reducing desync, improving lag compensation accuracy, and making hits register crisper in fast TTK fights. Tests and player reports confirm this edge cuts "ghost bullets" and peek disadvantages by 10-20%, so always prioritize low ping."