Ast-dual.safethings.avira.com

ast-dual.safethings.avira.com am told it part of homeshield am only using the qos feature
cloudflare gateway blocking it on tplink ax73 router

please advise

If you are using Cloudflare Gateway DNS you can review your DNS logs to determine what policy is blocking it and adjust the existing policy or create a new one for the domain name as needed.