I think you're piling on anxiety about a good many things - try to stop the anxiety running away with you.
All of your questions about masks can be asked at your next pre natal visit. Please talk to your doctor about everything that is bothering you.
I can't imagine they would make you wear a mask during labour in hospital - as pps have suggested, your body fluids are going to feature prominently in the experience of everyone in the room with you for several hours, and since many women vomit in labour on top of everything else, a mask could cause problems.
I can see why they would require masks for pre natal appointments, same as any other appointment or visit to a healthcare setting. A $300 fine for not wearing a mask outdoors - yes, I can see the reasoning behind that too. But the labour and delivery rooms of a hospital are different environments. Pulling your mask down to speak on the phone was very problematic.
At your next appointment, ask practical questions about hospital valet parking too - don't assume you and your H will have time to park in the parking lot and walk. Valet parking services can be affected by covid-19, and can be very important if labour is progressing fast, so if your doctor doesn't have any answers, call the hospital front desk.
I won't be able to see my husband's face the whole time or expression when the baby is born!
You are not going to give a flying fuck about your husband or his expression when labour gets serious. You are actually very likely to find your husband intensely annoying, and the only thing you will be focusing on after the baby is born will be your baby and the painful contractions as you expel the placenta.
Childbirth isn't a performance you are putting on for your husband's benefit. The universe will shrink down to the single room you are occupying and you will be in the center of it.
I've had five DCs in the US. Most OB/Gyns don't permit any food by mouth while you're in labour in the hospital. This is in case you need to be anesthetised for an unscheduled CS. You will have an IV for fluids, and you may be able to get ice chips or suck/bite down on a wet washrag. You won't starve. You will be very hungry afterwards, depending on when you last ate before heading to the hospital., but you will not feel any hunger during labour regardless of when you last ate.
They will offer an epidural and it's smart to at least get the cannula in place so they can get the pain relief started if you feel the pain is getting to be too much. If they don't offer one, ask for one to be put in place so you can use it if needed.
Best wishes!