the Hiby R6 has an unusually high output impedance of 10 Ω.
This absolutely can negatively affect low impedance headphones. (Iem's generally have low impedance < 32 Ω).
It is however not possible to directly look at the specs of a pair of headphones and accurately predict how / if they would be affected.
A general rule of thumb is, Single DD iem's should be fine, Multi-BA iem's could be problematic.
You can buy something like the i
Fi IEMatch to avoid any problems with
wired headphones.
However, you mention TWM iem's which AFAIK are bluetooth phones. Those would never be affected by output impedance.