How to reduce latency for Cognito globally?

We have a global audience for our service, but since our main market is the USA, we use us-east-1 for our Cognito service.

In many cases, we have to run queries like this cURL query

curl 'https://cognito-idp.us-east-1.amazonaws.com/' \
  -H 'authority: cognito-idp.us-east-1.amazonaws.com' \
  -H 'accept: */*' \
  -H 'accept-language: en-US,en;q=0.9,de-DE;q=0.8,de;q=0.7' \
  -H 'cache-control: no-store' \
  -H 'content-type: application/x-amz-json-1.1' \
  -H 'origin: https://scraiber-frontend.pages.dev' \
  -H 'referer: https://scraiber-frontend.pages.dev/' \
  -H 'sec-ch-ua: "Chromium";v="118", "Google Chrome";v="118", "Not=A?Brand";v="99"' \
  -H 'sec-ch-ua-mobile: ?0' \
  -H 'sec-ch-ua-platform: "macOS"' \
  -H 'sec-fetch-dest: empty' \
  -H 'sec-fetch-mode: cors' \
  -H 'sec-fetch-site: cross-site' \
  -H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36' \
  -H 'x-amz-target: AWSCognitoIdentityProviderService.RespondToAuthChallenge' \
  -H 'x-amz-user-agent: aws-amplify/5.0.4 auth framework/1' \
  --data-raw '{"ChallengeName":"PASSWORD_VERIFIER","ClientId": <client-id>,"ChallengeResponses":{"USERNAME":<USERNAME>,"PASSWORD_CLAIM_SECRET_BLOCK": <PASSWORD_CLAIM_SECRET_BLOCK>,"TIMESTAMP":"Mon Nov 13 18:22:30 UTC 2023","PASSWORD_CLAIM_SIGNATURE": <PASSWORD_CLAIM_SIGNATURE>},"ClientMetadata":{}}' \
  --compressed

Sadly, when pinging this from Europ, we get around 600-700 ms, which is quite long. I am wondering whether there is some elegant solution to get the latency down for various regions like Europe, East Asia etc.?