The statistics you're bringing up are as of March 31. Do note that 6% of reserves are in "Other Investments (including digital tokens)", and Bitcoin (as a proxy for all cryptocurrencies) is down ~30% since then, so that's at least 2% of their assets that have been wiped out by market conditions. Keep in mind that said report also said that, as of March 31, liabilities are 99.8% of assets, so Tether's accounts says it should already be underwater.
(Although, if I'm reading the attestation correctly, all of the assets--including cryptocurrencies--are actually valued at purchase cost and not fair market value, so what the actual present value of those cryptocurrences is now or was 2 months ago is extremely unclear. Transparent is the opposite of how one could describe Tether's financials.)