Cannot proceed with pool creation after selecting 2 wiped drives - 25.04.2.6

Hi all! Many of you have been really helpful and I very much appreciate it.

I recently removed 2 drives from a pool to create a different pool and they were both wiped. I then went to create a new pool, set it to mirror and manually selected both drives but Save Selection is not available. I get red text saying 2 drives are required which I have provided. Advice would be great!