In most oem roms it's an option, but in other aspects they tend to be worse than google's walled garden even.
From what I can remember Samsung and Oppo/Oneplus/Vivo/Realme have ability to change fonts but I wouldn't put my trust and money in any of them
The OG poster (lemmy.ml so whatever) forgot to mention that backups and system recovery are a nightmare if anything goes wrong with the kernel, bootloader or both.
Encrypt your home partition and swap, it's easier and who cares about what packages you have installed system-wide. If you got NSA on your ass you're cooked anyway. Encrypting non-system drives is more bearable
Good