How do you intend to use your bitcoin? Is it completely worthless?
There's nothing you can do but save yourself the conflict and save the hardware wallet. If there is no Internet, no cryptocurrencies, you have to wait for the situation to be conducive to moving away from the war zone and it seems that Ukrainians has gone to neighboring countries, then it is time to act on accessing hardware wallets.
From Ukraine's side, Bitcoin could provide safety of assets, your BTC will be there no matter what, even if banks collapse, or Ukraine enters EU and switches to Euro. You won't be able to use them if the internet/service is down, but at least your money will be safe.
From Russia's side, though, as I've mentioned before, sanctions by EU aren't actually hurting Putin, but his citizens, who saw Russian Rubble crashing and losing more than 30% of their money's value within a few days. In that case, Bitcoin would be useful to maintain the value and the integrity of your money.