Welcome to Vodafone Community
First insert the activated ie working Vodafone SIM card to see if it'll accept it.
If not then you'll need to navigate to Oranges now EE help and support page and or ring their customer service to see if you fulfil their criteria to unlock.
If you do they'll provide you with an unlocking code.
Current Phone >
Samsung Z Fold³ 5G.
Previous Phone >
Samsung Note 20 Ultra 5G - SM9860.