Absolutely! Perhaps the tricky part is determining how much is too much.
If your friend has specified that they would like to be left alone and given some space, do respect that As people with lived experience, we find that it helps when people drop us an occasional text or does something that lets us know we aren't forgotten. Unfortunately, we might sometimes feel the pressure to respond, which makes us want to get into hermit mode.
But this isn't necessarily reflective of everyone and will depend very much on context and the unique dynamics of each relationship and each individual's personality. Please don't take our lack of response personally... and please don't give up on us. We're doing our very best and want to be better friends once we are able to.