Poor Wi-Fi signal on MacBook Air upstairs

I have a MacBook Air, the (latest?) model from 2021 purchased new in 2021. Apple M1 chip. Using Ventura 13.4. I get one, maybe two bars in my bedroom, which is upstairs and around the corner from the router. Linksys Wi-Fi system; it had been in a back office in our home, but now moved to another one (that used to be a downstairs bedroom). We have a Wi-Fi extender, and have tried it in several locations, including the living room, upstairs hallway, and master bedroom.

When I sit downstairs or near the W-Fi router, it's OK -- three bars.

Consequently, my husband, who uses my old MacBook Air, bought in 2013, has no Wi-fi signal problem, always getting 3 bars in the bedroom. He thinks there could be a problem with my 2021 model. Could there be? Any suggestions? Thank you.