No, the ebacc is just used as a performance metric for schools. So yours, like many, is just lying to you in order to boost stats. You don't receive any actual notification or certificate for having achieved it.
No - it is an artificial construction that is important to the school and not you.
EBacc is something you automatically get from having done all of English, maths, sciences, a modern language and either history or geography at GCSE. You do not get a grade and it is only used as a performance metric for schools.
If you were to do a normal combination of subjects, including Spanish, that would still count as EBacc.
Better than Welsh Baccalaureate we do.