Neither player has featured under Ten Hag, with Williams missing out on United's summer tour of Thailand and Australia due to his injury issue.
Tuanzebe flew out with the rest of the squad in July, but he wasn't involved in the 4-0 victory over Liverpool in Bangkok and departed the tour prior to the Australia leg, being replaced by Will Fish, who is now on loan with Hibernian.
Both Axel and Brandon have been back at Carrington in recent weeks, with the latter further ahead in terms of his recovery timeline, according to Ten Hag.
“I see good progress with Brandon Williams.