i play on a server where you can get "infinite" versions of block, basically blocks with custom enchant and name that you can place forever and it stays in your inventory, i have an infinite block of stone, so i planned a big stone structure with litematica, but the easy place does not allow me to use that block to place stone

technically, it IS just a stone block, but with enchant and custom name, i wish the mod would allow me to use it to place stone on easy place

There is already an option for this, but apparently it's still only in the 1.12.2 version... But the 1.19 ports are planned to be based on the newer 1.12.2 code base, so it should be in the 1.19 versions once they come out. The 1.13.2 - 1.18.2 versions will get it later when the 1.12.2 code is "more ready" and is ported to all the MC versions.

i dunno what i did, if anything at all
until yesterday i was able to "easy place" with custom named blocks, and now it doesn't allow me to use them, i don't understand why

could you tell me what i need to do to be able to use them again?

nvm, i found the issue, i had changed printer mod from "[Litematica Printer] by [RandomGgames]" to "[Litematica-Printer-Easyplace-Extension] by [aria1th]"

and when i switched back, i became able to use easy place with named blocks again, i'll bring my complaint to aria1th instead XD