This is a piece of news to me, I never thought that a mobile wallet could send multiple addresses unless a desktop wallet like Electrum is used, Kudos to Bluewallt team/devs. But yeah, as of the moment Electrum mobile doesn't have this feature yet, i guess it will be available maybe in the future.
I think mobile devices are more sensitive with mistouch, mistype and other mistakes, so it makes sense that Electrum wallet developers didn't build up Pay to Many Addresses for Electrum mobile.
Bitcoin transactions are irreversible and if you did a pay to many addresses inaccurately, your bitcoin gone forever and you will not get it back by reversibility of blocks and transactions. It's impossible.
OP can import a wallet mnemonic seed to Electrum (desktop) and use Pay to many.
[Electrum] Send bitcoin to multiple addresses | Mass payment | Multi payment