Thinking of making an upgrade, advice on ram

Hi all, this sub was a great help in preventing me from needlessly spending $400, so I am back with one final question

My current build is a Ryzen 5 1500X, on a B350 mobo with 16 GB (two 8GB) of DDR4-3200 ram

I am going to go up to a Ryzen 5 5600T, with a B550 mobo.

Question is, I’m debating adding some more ram into my system. They have the exact ram I have currently so no compatibility issues there. The question is do I go 4x8GB? Or with the 5600T is dual channel the best option? I don’t play super intense games anymore, but I heard cities skylines 2 eats up quite a bit of ram so I was thinking of doubling up to 32GB. Just not sure if I should buy a new 2x16 set or add in 2x8 of the same stuff I have and go with four sticks.