Good evening. Ceramic crowns cannot cause dryness in any way. Dry mouth can be caused due to decreased salivary secretions. To begin with kindly use Saleva mouthwash, a product from DentAids. Gargle 15ml twice a day for a min for 2 weeks and see if there's any difference.
Next Steps
In case there is little or no difference after a considerable time period, kindly contact a dentist post lockdown. Further investigation maybe needed.
Health Tips
Make sure your water intake is adequate.