Are you sure you are searching for the account name and not for the character name?
And if so, did you put the full account name (including #xxxx at the end)?
Switch zones should help
And yes #1234 is important
I bought poe 2 on steam and poe 1 on the website.
As i merged my acc to steam i got a new #xxxx so thats why i couldnt see my items.
Sadly ALL my bought stash tabs on my old acc is now locked on poe 1 and i have to buy new ones fopr poe2
TY for help guys