Question about Apple MacBook Pro 16 – Late 2021 (16.20 ", M1 Pro, 16 GB, 512 GB, DE)

I have tried to connect this MacBook with my mini Mac via screen sharing and mirroring. It won't connect even though I have clicked on sharing screen on both computers and see the item in Finder but it doesn't work and says make sure the firewall is off. Turned that off too temporarily and still didn't work. Why doesn't it work. Driving me crazy!