I94 going to expire with valid H4 visa

I have h4 visa stamped till 2022 and I came back to USA in 2020. At POE, I don’t know why they asked me i797 though I got visa stamped. I gave them my last i797 which was till 2021 and got i94 till 2021 March.

Can you please tell me ways to get my i94 extended as I don’t want to travel. Can I go to USA border to get my i94 extension? Please help.

You can visit the border.