Sent a picture of the app (on the new phone).
Let me know what you think.
So it's an imported watch-only SA account, means that you've imported an 'address' instead of a 'private key' to include that address in your wallet.
The bad news is there's absolutely no way to spend from that wallet without the address' "
private key".
Bitcoin doesn't have a central authority/server to retrieve users' lost keys or balances, it's up to the user unless the fund is in a centralized service like an Exchange,
Mycelium's SA Bitcoin wallet isn't centralized.
The question is, where did you get that address from?
Because depending on where, you might have a chance to recover the funds.
Funny thing is: You claimed that it's "
a couple of years ago", but you've used the default name which is the date when the address was imported
What gives?