Waiting for 190 visa grant

Hi all. I have applied for 190 visa on 9th april and co contacted me on 27th april for missing pcc and also told me to sign form 815. Its been 4 weeks since submitting form 815 and no response yet.Any idea how long it might take to get a grant. Also I heard signing form 815 is like a pre grant is this true. Plz suggest

hi, did you get your visa