MacAir screen extender

Good day, I have a MacAir M1 and I want to get a second screen / screen extender for my MacAir.

I am looking for something mobile to carry with me & the MacAir.

Anyone got a solution to this?

I was thinking either going the route of getting a ipad/tablet to use a second screen or to get a laptop screen extender but want to see if there is any viable/cheaper option available because to buy a ipad purely for the sake of a second monitor seems a bit excessive/expensive.