Try to stick to open-source apps from the F-Droid store.
That was my plan
Unfortunately there aren’t many tablets out there with official LineageOS support. Here’s the list, you can filter by device type “tablet”: https://wiki.lineageos.org/devices/
I was checking it and yea, there isn't much, sadly.
I have an old Galaxy S6 Lite
I saw that the Galaxy S5e had a great screen but I was afraid the chip was going to be slow as fuck, and it doesn't seem great
So my only real choice is a Pixel tablet then? Might wait for some promo, I find it pretty expensive
I was also considering the Xiaomi Pad 5 which is supported by /e/OS and is much more affordable