It looks like with production underway in Atlanta this week on Black Panther: Wakanda Forever that the sequel is going ahead as planned.
Interestingly enough, Loki cinematographer Autumn Durlad Arkapaw has posted a video on Instagram of director Ryan Coogler playing basketball on a court. This seemingly confirms she’s working on the film as Black Panther’s cinematographer Rachel Morrison is busy on her own project.
Morrison adding fuel herself by sending her love with a reply on the post from June 18 and further confirming that Autumn is working on the Black Panther sequel. Auntumn Durald Arkapaw was recently in Atlanta working on their DIsney+ series Loki and has a fantastic eye as the show is one of the best looking projects to date.

Black Panther: Wakanda Forever is set to be released on July 8, 2022.
SOURCE: AUTUMN DURALD ARAKAPAW