Contrary to popular believe items sent to some European countries have to clear customers anyway. It may affect countries like France and Germany where its not customs cleared, but it won’t affect most other countries.
I send a lot abroad, and you can tell the difference in countries that custom clear and those that don’t.
The rules on clearing for non EU countries is published here https://trade.ec.europa.eu/tradehelp/eu-import-procedures
HMRC have issued companies that need an EORI number automatically, in fact I received mine last week without even requesting one.