You may encounter the message Your domain is connecting to Hostinger in different parts of hPanel:
There are multiple reasons for that:
You've recently registered a domain name at Hostinger, and it hasn't finished activating yet – you don't need to do anything – the issue will resolve on its own within the next upcoming hours
You've recently pointed your domain to Hostinger, and DNS propagation is still in progress – keep in mind that it might take up to 24 hours for new DNS records to propagate; if you've pointed the domain by creating an A record, make sure that you've used the correct IP address
Your domain is temporarily suspended due to failed domain verification; if that's the case, verify your domain – it normally takes a couple of hours until the domain is back on track and the error message is gone from hPanel