Hi Natwalking,
Welcome to the Apple Community.
Re: "I can't downoad certain apps from app store",
You might want to see if this article from Apple Support helps:
If you can’t download or update apps on your iPhone or iPad
If you can’t download or update apps on your iPhone or iPad – Apple Support (AU)
The payment methods Apple accept from Georgia says "Most credit and debit cards".
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How to check if any restrictions are set on purchases:
Manage App Store purchases, subscriptions, settings, and restrictions on iPhone – Apple Support
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Re: Im from Georgia (country) and automatically Im directed to Russian app store, which is disabled after War.
You might want to reach out to the App Store Support Team
There is a "Get Support link at the bottom of their website (link below)
App Store - Official Apple Support
or
Apple support for Georgia
webpage:
Official Apple Support
All the best :-)