appsource.microsoft.com refused to connect.

[Ashe_-123]

I unable to import vissual from app store

[Ashe_-123]

I unable to import vissual from app store

[Ashe_-123]

I unable to import vissual from app store

[Ashe_-123]

I unable to import vissual from app store

[v-jtian-msft]

Hi,@Ashe_-123 .I am glad to help you.
According to your description, you can't get more custom Visuals in Power BI Desktop using the APP Store feature.
Import Power BI visuals from AppSource or from a file - Power BI | Microsoft Learn

When accessing it, the system rejected your request, I think the problem may be in the network, please ensure that your network connection is stable.
Unable to import the visuals from AppSource - Microsoft Fabric Community

Try to clear the data cache, log back into your Power BI Service account, and if possible, use the latest version of Power BI Desktop
Solved: Unable to import the custom visual object - Microsoft Fabric Community
Try getting more visuals directly from the business app website.
Business Apps – Microsoft AppSource

I hope my suggestions give you good ideas, if you have any more questions, please clarify in a follow-up reply.
Best Regards,
Carson Jian