I have walked this route. It is a wonderful camino. The Portuguese people are the best. Since I have no idea about restrictions, I will not comment. I think what would be wise is to have as many resources as you possibly can to track which albergues are opened or closed. I do not know if there is a pilgrim office or society in Lisbon to see if there is information. Maybe at the Cathedral. Or someone here as information regarding this. I would say that you should have as many resources as you can regarding accommodations along the way. I know Gronze.com is updating albergues that are open or closed. I do not know how up to date this is. I would recommend also using the Buen Camino and the
Wise Pilgrim apps. They are both free and no one app has a complete list. I would also download Booking.com if you need hotel reservations. I would plan ahead to and call the albergue/hostel etc. the night before to make sure they are open. As an example the first stage from Lisbon traditionally ends in Alpriate. Gronze and Wise only list the closed municipal albergue. The next town that has accommodations would make the day out of Lisbon about 30K. I know there is a hotel at the beginning of the town because some pilgrims I met stayed there as the albergue and church were full. Luckily alot of Portuguese people speak English. They are also very helpful to say the least. I didn't walk to Fatima so I can't speak of that. I also did the Central route out of Porto. There may be more open accommodations on the Coastal route as it is very touristic. If you can get into Spain if I were you I would look into the Spiritual Variant as it is supposed to be really beautiful. But again in these times it could be risky. Buen Camino. Remember in these times a little planning will go a long way.