I used to hook my S8 up to TVs and monitors when I was away before I changed job as work would never provide a laptop (!) and I found the tablet and keyboard not to my taste (each to their own).
I bought a cheap hub from a large online retailer for £21 back in 2018 and it works just fine. If you want to use DeX mode you need to use a phone charger to power it but you can add a full-size keyboard if you really want! Haven't tried it with my Note20 but I'm sure it will work.
The brand was called "Goodex" and looked a bit cheap and tacky, but spend more time looking at the screen and not at the hub, so that doesn't matter.
I like DeX (not sure who the other person is though) but also hate Bixby.