On needing to avoid exertion leading to high risks of Longcovid alone, you should probably be taking a fortnight to a month off work, symptomatic or asymptomatic, to relax and vastly reduce your chances of picking up a disability. Powering through is probably the least intelligent thing you can do this decade.
Trust me, you get Longcovid you won't be powering through fuck all ever again. Unless you count eating or getting to cleaning a one bedroom flat. Don't fuck around.