as i don't know where i stand with apple if i do so.
Unless you are an apple employee, or have contractual obligations towards Apple (like if you are bound by the MFI agreement) it is likely indeed irrelevant.
There are ways to do stuff with BT but Apple has (rightly so in my opinion) put constraints on who can get the entitlement and bundle that in a shipping app (and not a side hack you compile locally on a (jailbroken-able) very old iPad as OP was referring to).
If you found a way to circumvent this and exchange data with a non supported BT profile within the current OS and standard developer entitlements then indeed it should not be discussed in any details and you should send documentation to Apple’s bug bounty program and can make solid bucks out of it possibly (Bounty - Apple Security Research)