Normal occupancy of league footy stadiums has been allowed since Friday 1 October 2021. The article here on the Sur in English site has the details.
Read More for a bit more detail.
There is still a rule about wearing masks. Plus no eating and smoking allowed in the stadium.
From personal experience, I know that they do allow you to drink water from a bottle no greater than 50cl in size. At least that is the rule that has applied for a while in the UD Almería stadium.
There has been part of a process of relaxation of the rules over time. At our last home match we were allowed to sit in our own seats for the first time. Previously we had to sit in socially distanced seats. Also, at the last home match they allowed 200 non-season ticket holders to enter the stadium. Previously it had been season ticket holders only.