The fee is actually just ok to get your transaction confirm later but at the moment the fee highest priority is around 11sats/vbyte. But have you sent the transaction for far too long, because transactions with even 5sats/vbyte were getting confirmed earlier on.
Nonetheless if it is showing unconfirmed in electrum wallet, no need to worry too much about maybe an error, it would get confirmed later
The highest mempool fee for fast confirmation right now is around 9 sat/vbyte. If he can wait, yes he should not be worried at all because the transaction will later be confirmed. Possibly it can be confirmed very soon.