I doubt that honestly.
Raphinha is in his best form these days. Why would Hansi Flick decide to cut him from the starting lineup to "rest"?It doesn't make sense while he is one of top goal contributors. Rashford will need to earn his place there. He will need to work hard to stay fit and impress the manager. I can't say he has been in his best physical shape recently.
It's a non sense decision by Barcelona. They wasted 270k weekly to sign someone who will always be benched the whole time because of his competitor is still in the prime performance. I'm sorry, but it seems no place available for Rashford. I don't think he can compete with Raphina for LW position.