Countries have been affected differently by COVID-19 and governments have placed a variety of restrictions that might affect the production of goods. It is important to keep in mind the fact manufacturing has completely stopped in some countries.
Your first step should be to try and source similar products from other suppliers as soon as possible. Sourcing locally-made products, if available, will result in more dependable delivery without overseas shipping.
If your supply chain needs affect your ability to provide products to your customers, manage expectations and mitigate customer service requests by communicating this to them.