The sale prospect of a business are dependent on its ability to generate profitable, sustainable, and recurring revenue.
Buyers or financiers review the historical performance of a business to evaluate its track record and gauge future potential. Any past disruptions due to COVID can cast doubts during such evaluation.
The best way to address these doubts are to have strong data from pre-covid and post-covid period as well as any benchmark data from within your industry and geography.
If you can show that sales, for example, now exceed what they were pre-COVID, then this is a great story to be able to tell about your business. Context is key.