Welcome to Microsoft Q&A forum and thanks for reaching out here.
As per my understanding looks like Tabular model Explorer is disabled.
Could you please try changing the extension settings
for Analysis Services Tabular (Open VS -> Extensions
-> Change your settings for Extensions
-> Analysis Services Tabular
) as below:
New Project settings as -> Default compatibility level as SQL Server 2019/Azure Analysis Services (1500)
Reference community thread: Visual Studio 2019 - Tabular Model explorer disabled
Hope this helps. Let us know how it goes.
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