The verdict
If you sell software or digital products to people in many countries, I'd pick Lemon Squeezy, because the tax handling is the hard part of selling abroad. If you are a freelancer or sole trader who invoices clients and wants business money kept apart from personal money, I'd pick Revolut Pro.
These can be used together. Revolut Pro would be where the payouts arrive. I would not expect Revolut Pro to handle tax for you, and Lemon Squeezy is not a bank account. Also read what Stripe's ownership of Lemon Squeezy means for the product before you build on it.