I can't say much about albergues in Portugal, but once you are in Galicia - about half way from Porto, public albergues will NOT have blankets. All albergues municipal run by Xunta de Galizia (those for 8 euro), by law, can't have blankets in their albergues. I think this was introduced even pre-covid as a sanitary rule to stop spreading bedbugs from one albergue to another.
All albergues municipal in Galizia also won't have utensils in kitchen, ocasionally you may find "something" like a cup, a glass, a random spoon that someone left. But don't count on anything. Usually there is a microwave and you can make a tea if you have your own plastic cup (and a teabag)
Because of no blankets rule, a week ago I paid 15 euro for a private albergue in Fonsagrada instead of 8 euro for a municipal next door - even if I had a light sleeping bag - as the night was expected to be very cold (-3C). Albergue in Lugo was warm, albergues in Castroverde and Santa Irene - barely OK. I slept in my clothes inside my Decathlon sleeping bag.
On the other hand, it seems like all the Xunta albergues now have a washing machine and a dryer which is nice.