Looking for a 10 inch tablet with proper, official Lineage OS support I ended up on the device database. Unfortunately they do not have a simple list of device types. So I wrote some code to extract the tablets with support of at least version 17. The list is short…:
7 inch tablets supported by Lineage OS in 2021
Google Nexus 7 2013 (Wi-Fi, Repartitioned) [flox]
10 inch tablets supported by Lineage OS in 2021
Samsung Galaxy Tab S5e (LTE) [gts4lv]
Samsung Galaxy Tab S5e (Wi-Fi) [gts4lvwifi]
Samsung Galaxy Tab S6 Lite (Wi-Fi) [gta4xlwifi]
Comment if you need an update in the future.