EDIT: @mindbleach@sh.itjust.works shared something that might help to circumvent this shit:
Contained in these parentheses is a zero-width joiner: ()
Basically, add those to whatever you feel that might be filtered out, then remove the parentheses. The content inside the parentheses is invisible, but it screws with regex rules.
🄻🄴🄼🄼🅈
🅻🅴🅼🅼🆈
𝚕𝚎𝚖𝚖𝚢
𝕝𝕖𝕞𝕞𝕪
ʟᴇᴍᴍʏ
𝔩𝔢𝔪𝔪𝔶
𝖑𝖊𝖒𝖒𝖞
ℓємму
𝓁ℯ𝓂𝓂𝓎
𝓵𝓮𝓶𝓶𝔂
ⓛⓔⓜⓜⓨ
🅛🅔🅜🅜🅨
ｌｅｍｍｙ
𝗹𝗲𝗺𝗺𝘆
𝐥𝐞𝐦𝐦𝐲
𝘭𝘦𝘮𝘮𝘺
𝑙𝑒𝑚𝑚𝑦
𝙡𝙚𝙢𝙢𝙮
𝒍𝒆𝒎𝒎𝒚
l͟e͟m͟m͟y͟
̶l̶̶e̶̶m̶̶m̶̶y̶
̶ʎɯɯǝl
ymmɘl
ˡᵉᵐᵐʸ
🇱🇪🇲🇲🇾
J̷͚̦͙̦̅̊̾̓͂̋̋͊̆́͐͑͜O̸̧̨̱̰͚͍̼̺̰͇͎̜̺̥͋͊́Ĭ̸̢̥͖̲̗̉͊̈́̐ͅN̷̛̤̙̖̗̰̲̪̰̰͓̪̒̊̂̑̑͌͑̒̄̀̆̇͒͌͐̚ ̸̡̨̲̣̳̪̮͈̩̭̙͈̗̭͖̃̏̽̄͆͌̂̀́͒̚͜L̸͇͇̬̜͈͔̩̣̲̩̳͉̥̳̈̒̉̑̅͑̀͊̓̍́͌̊̓̕͝Ẻ̷̡̟͔̖̯͕̩͎̺̮̙̜̭̬͈̦͊͆͜M̸̜̲̱͍̱̪̗̘̯̗̳̯̥͂̆̈̄̉͋͂M̸̡̤͈̝̺͖͉̺̓̍̄̂̾̍̓̆͆̑̀̏͐̕͝Y̶̢̜̱̘̟̩̠͊͂̀̿
ⓛⓔⓜⓜⓨ in bio
@Kolanaki@yiffit.net
And using different combinations of the letters too
🇱🅔ᴍᴍ🅈