I would consider running a cable to an Access Point to an appropriate location. I recenlty installed a Zyxel AP for a large Care home and with one AP in the centre of the building they are getting good sigals around the house.
https://www.amazon.co.uk/ZyXEL-Wireless-802-11ax-Manageable-Standalone/dp/B09925PHCZ/ref=sr_1_11?crid=37PDT72IY2V9H&keywords=wifi+6+access+ceiling+mount+ap&qid=1695826066&sprefix=wifi+6+access+ceilling+mount+ap%2Caps%2C513&sr=8-11