I just uploaded a verification from my employer of my position, tenure and remote working status. That was sufficient for my embassy (NL) but other embassies could differ.
Anyway my employment contract is 22 years old and bears no relation to what I'm doing at the moment 😀
Well my contract is 22 years old and totally irrelevant to my current function and working conditions so I asked my company for a verification letter that states my current job function, length of service and that I am a WFH/remote worker.
This is what I uploaded along with a recent wage slip. This was accepted. Embassy was the Hague, NL. But best to ask the embassy what they need exactly.