As a frontier worker, you may be subject to the laws of the country where you work and the one where you live.
Check the information on the EU4FairCare portal to understand the rules that apply to your situation.

EU4FairCare supports workers, employers and intermediaries in the long-term care sector to understand their rights and obligations when working in, recruiting for or providing long-term care services across EU borders. It also offers information relevant for households that use such services.

Here you'll find:

• what general rules apply
• what your main rights and responsibilites are
• where to find detailed EU and national information

Check this video for more info https://youtu.be/wwacM887Y5A