ios app blocks outgoing requests to some domains after build

Wrote a react native application that uses SMS authorization, the user is asked for a phone number and sent to the server. When debugging, everything works fine, but after building the ios and adding it to testflight, requests to this domain are not sent. fetch writes an empty error, axios "request failed with status code 447". A simple POST request is sent.

In debugging, everything works, only the assembly on iOS breaks, andoid worked. Send over https, let's encrypt certificate.

fetch(apiUrl, {
      method: 'POST',
      body: body,
      headers: {
        'Content-Type':
        'application/x-www-form-urlencoded;charset=UTF-8',
      },
    })

axios.post(apiUrl,{
        phone: phoneUnmasked
      })
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domain added to Info.plist

<key>NSAppTransportSecurity</key>
    <dict>
      <key>NSAllowsArbitraryLoads</key>
      <true/>
      <key>NSExceptionDomains</key>
      <dict>
        <key>localhost</key>
        <dict>
          <key>NSExceptionAllowsInsecureHTTPLoads</key>
          <true/>
        </dict>
        <key>testdomain.kz</key>
        <dict>
          <key>NSIncludesSubdomains</key>
          <true/>
          <key>NSExceptionAllowsInsecureHTTPLoads</key>
          <true/>
          <key>NSExceptionRequiresForwardSecrecy</key>
          <true/>
          <key>NSExceptionMinimumTLSVersion</key>
          <string>TLSv1.2</string>
          <key>NSThirdPartyExceptionAllowsInsecureHTTPLoads</key>
          <false/>
          <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
          <true/>
          <key>NSThirdPartyExceptionMinimumTLSVersion</key>
          <string>TLSv1.2</string>
          <key>NSRequiresCertificateTransparency</key>
          <false/>
        </dict>
      </dict>
    </dict>