Paypal express button disappears when test mode is deactivated

[HiddenGems]

Hello,

I have the paypal payment method activated and when I disable the payment test mode it changes the paypal button for G Pay and I can't find a way for the paypal payment method to appear on the screen as the default payment method, which is the one that interests me.

I've checked with the theme developer and they say that's not a theme issue.

Any ideas?

Many thanks