Sonoma 15.5 worked fine for a few days, froze, hard shut off... now the Internal is not being recognized. Blank screen completely when turning on for 15 mins. Any tips / Suggestions / Insight?

Macbook Pro 11,4

Had it load 15.5 install patches and was working pretty well for the most part.

Then when it froze I shut it off for a few days.

I went to turn it on, and it was just black.. no apple screen... no boot from hd...nothing.

After 15 or so minutes, the black will show 3 options. Without a HD, just the the EFI Boot, Shell, and reset pram options.

I tried all the startup option keys to reset or boot from, and nothing

Occasionally, I will get the flashing folder, and sometimes I can get the internet recovery to work. When I do, the SDD is completely missing from the Utility disk....

Is it possible there's some corrupt initial boot or is it more likely just timing and the SDD shit the bed?

thanks in adv