The ongoing assumption is deaf are all good lip-readers but the signers really do not rely on lip-reading. Clear masks present issues in that they aren't protection from COVID, so apart from risking yourself, you are asking others to as well. The pandemic means you may well be asking someone to risk their lives so you can lip-read them. That may be a 'right' too far to make a demand with given no law would empower that.
It is difficult without seeing all facial features, but it has to be balanced with risk. One charity survey suggested that more HEARING were suffering communication issues with masks on, up to 89% of them did. We have a disability of the sense that is our bad luck, so nobody to 'blame' about that. COVID means the usual debates and issues regarding rights have gone out the window and you cannot fight a virus with a rights message. It will still infect you.
We just all have to accept everyone is in the same position and adopt the rules until a vaccine gets it under control. Deaf suffer because they are isolated anyway and in part, because they prefer to isolate themselves within their own community, which COVID has seriously undermined by making social contact virtual instead or actual. From what we have seen deaf haven't switched to that option and more isolated as a result. This may be down to the reality their reliance on each other wasn't as good as it gets, and they need to find more effective ways of reaching out to hearing instead of going it alone.
COVID has proved the deaf way is its own Achilles heel so perhaps now is the opportunity to change the way we address isolation. From what we know deaf won't adapt and will wait it out and carry on as before, I am unsure that is progress the opportunity to acquire viable alternatives are now.