Not injured, just not ready to start yet. According to the press conference at least.
That’s absolutely the sort of thing I could imagine someone making up as a bit of attention seeking.
https://www.theguardian.com/football/2021/aug/25/leon-bailey-aston-villa-via-slovakia-and-a-cold-austrian-park?utm_term=Autofeed&CMP=twt_gu&utm_medium&utm_source=Twitter#Echobox=1629887961