1. Looks like your domain is registered through Namecheap…

2. Also looks like your redirect is going to http (non-ssl https) first. So that is part of the delay

3. There may also be a www vs non-www delay (I can’t tell that from the public end)

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The above tells me you are just forwarding your domain instead of having it connected to your notion site

Here is Notion’s help article https://www.notion.so/help/connect-a-custom-domain-with-notion-sites