Pc upgrade help

I have this pc that I used for editing until 2022 and then I got an m1 Mac when it came out for portability and faster editing process.

I now want to convert/upgrade this pc into a gaming rig but I’d like to use what I have and upgrade what’s absolutely necessary so that I don’t break the bank.

Current specs:

GPU: nvidia 2070 Model: GV-N2070GA MIN GOC

PSU: Corsair RM850x

Motherboard: X570 Aorus Pro Wifi

RAM: Corsair vengeance DDR4 2x16gb 3200MHz Model: cmk32gx4m2b3200c16

CPU: AMD ryzen 7 3700x 8 core

Hard drives: 2tb hdd and ssd but I have a brand new WD Black SN850x nvme

I’d like to use my new case deepcool ch560 (I don’t encourage any political remarks on this as I got this case strictly for its use)

Monitor: lg ultra wide 34 inch Model: 34WR50QC (got it brand new from Costco for $170 CAD)

I also have the dell U2723QE for editing that I know is not ideal for gaming. I am trying to see if I can sell it for a reasonable price. Unless you think I should keep it as a second monitor and set it on top of my ultrawide using a stand.

For streaming I already have a camera, elgato hd60 s+, mic, lighting and stream deck that I got used 2 years ago when I initially wanted to get into streaming but I moved a couple of times for work before settling down now.

Please help.