Hmm did that change? I remember being placed on the Covid IL did open up a spot on the 40-man roster before. It’s how the Marlins managed to have a 60 player 40-man roster a couple of years ago.
I currently see 42 guys on the 40-man roster, with Stiever being the only guy listed as 60-day IL so I'm going to assume this is still the case.
To open up a spot on the 40, they should be able to transfer Crochet to the 60-day IL.