How long should i wait till i take off the plaster?

You would need to check the jailbreak subreddit, there is a list with supported versions and devices.
https://www.reddit.com/r/jailbreak/ see the list on the right side

I specified background read

With the upgrade to iOS 13+, all iPhone 7 and newer can read and write an NFC Tags.

“The NFC behavior of iPhones updated to iOS 13 (and later) is very similar to that of Android smartphones:

  • for NFC Tag programming, an application is required (as for Android);
  • it is possible to read the UID of the NFC chip;
  • iPhone XS and later support background tag reading, without a specific application being open; previous models require a specific application to be opened (with iOS 14 it is native).”

hey dude, could you let me know what tweak you instaled to get nfc working on your iphone? , cheers

It was NFCWriter from Limneos, however it’s paid and has a few issues

thanks, i jail broke my iphone 6 as it was the only iphone i had that could be jail broken as of right now, but umm yea, turns out, the nfc chip in my 6 isnt working XD so ether i gotta go get it fixed or find a cheep old android that can read and write nfc tags, i think ima go the cheep phone route tbh. cant be assed with the faffing arroung anymore