Yeah, I would probably try for a 3600, as they can currently be had for around $200 (at least in the US), and their newer Zen2 architecture will generally perform a bit better in today's CPU-limited games than a 2700X. The 2700X does offer two additional cores over the 3600, but practically all current games (along the vast majority of desktop software) won't really utilize those extra cores, and due to the 3600's higher performance per-core, it actually manages to come relatively close even in those heavily multithreaded tasks. With the 2700X currently priced a little under $300, it's arguably not worth the large price premium for what will amount to slightly worse performance in most of today's applications and games.
From the look of it, that motherboard appears to have support for the 3000-series processors, but you will likely need to download and install an updated BIOS first...
https://www.gigabyte.com/Motherboard/GA-AB350N-Gaming-WIFI-rev-10/support#support-cpu
It's worth pointing out that the majority of today's graphically-demanding games with the settings turned up will mostly have their performance limited by your 1650 SUPER. Less graphically-demanding Esports titles at competitive settings (like fortnite and so on) may see more benefit from a CPU upgrade though, as will an increasing number of future games as they will likely become more demanding on the CPU due to the new consoles seeing significant CPU upgrades this generation.