You can, Deel etc. make this pretty easy.

Deel is one of the reasons why my policy for working for foreign companies is "B2B or I'm fucking off". Everyone I know (employees/contractors using it, not the other side) who went for it hated and regretted it.

Singling out Deel because you brought it up (and I ragequit after reading their "deel" and consulting it with a local lawyer), but I have the exact same story for every employer of record I've been involved with here in EU, and I don't know a single person who's been happy with them either (again, all employees/contractors).

I understand that it's comfortable and convenient for the employer (presumably, or at least the perspective of outsourcing this and reducing liability outweighs everything else), but these companies absolutely do not know what they're doing wrt local laws.

How certain are you of this? I only have anecdata, but when I tried to use a 3rd party agency to hire someone in France, from Ireland I got the process through several layers of management, up to and including the CEO and COO of my American employer, and HR, and legal counsel, only to be warned away in the most emphatic terms by external counsel. They told us of the risk of large fines and jail time in France for executives of companies doing this.

As I said, anecdotal, and a few years old.