You're welcome.
Because I wanted to get P2SH nested segwit (P2SH-P2WPKH) which will look like normal P2SH addresses (start with 3).
During setup I have created Bech32 wallet unintentionally or maybe not, but I didn't saw any option for P2SH.
Nested Segwit (P2SH-P2WPKH) was only ever meant as a tempory transition to native bech32 Segwit. Electrum decided to just go straight to the end goal so it is not an option. A good feature of Electrum is it is easy to maintain multiple wallets so I'd just keep 2, 1 for Segwit and 1 for legacy.
That should happen almost immediately. Try changing the server it is connecting to.