We still have no official Multi Player from SCS and have to play the third party one but Truckers MP is doing very good and recently celebrated its 6 years anniversary. Huge community around TMP is always impress.
Please note that currently TMP doesn’t support latest 1.37 patch neither for ETS2 nor for ATS so you need to downgrade your version on Steam to play with friends.
The short URL of the present article is: https://trucksim.top/w418