Is there a text editor/notes app that adds Unicode symbols?

For example, there is Material Notes which has a editor toolbar with bold, indented, stroke, etc. But this is rendered, exported to json or syntax like Markdown. This app too, in which i write this on lemmy, does the same. We have ☐, ☒, •, ‣ in Unicode, 𝗕𝗼𝗹𝗱, 𝑖𝑛𝑑𝑒𝑛𝑡, s̵t̵r̵o̵k̵e̵, so why not use this?

Basically, what i'm looking for is a text editor with toolbar/keystrokes for Android or Linux, which adds unicode symbols for rich text. It would make reading plain text notes/todo lists cross-device simpler. Yes, there's UnicodePad and Charmap but that's not the same.

edit: something where you mark a word, tap the B in the toolbar or press ctrl+b and it replaces the characters with uc bold characters, no? Tap the list button and it adds uc bullet points, etc...