VSCode installed extensions no longer appear on the menu

[Current state]
Previously, I wrote HTML in VSCode.
At that time, I installed various extensions, but there was also a Preview function.
I used it to do HTML previews and check while writing code in VSCode.

After that, I had the opportunity to write Python, so I installed and used Python.

After that, I had another chance to write HTML after a while, and I tried to write it in VSCode.
This time I noticed that I can no longer see the extensions I have installed from the menu.

Also, when I right-click on HTML, the preview came out, but this time it didn't come out, so I'm in trouble.
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考えたThinking こと
Maybe because I installed Python, VSCode is in Python mode and HTML extensions don't come out...?and
I thought a lot about it, but I don't know.

"Also, there were many problems regarding the lack of enhancements on the menu, but I couldn't find a way to deal with it."

By the way, we have confirmed that the extension itself is properly installed.

Nevertheless, HTML→Python→HTML does not provide any enhancements.

How can I get out again?
Does anyone have this experience?

html vscode

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