Difficult. I can only suggest trying google: venues for wakes near me and then phoning. Coming out of lockdown, there should be somewhere who needs your custom. If you’ve already done that without success, I’m stumped.
2 ideas: I don’t know what tier you’re in, but can you invite a select few (max for your area) back to your or her house and order some food or just serve hot chocolate in the garden? The 2nd idea is simply to postpone it until restrictions are eased. That’s what I did.
Neither option is much help… It’s difficult especially when it’s the death of an older person. Cxxx