Prostate cancer advise

My husband has had psa blood tests and rectal exam also mri 2 weeks ago just received a letter saying 3rd May appointment with pre assessment team then 6th May Covid19 swab then 9th May he's to go into day surgery unit at 12 pm but no idea what for can't get through to anyone I can only presume it's a biopsy as his prostate is very enlarged the doctor said can anyone advise as he's panicking now thinking all sorts