These extensions are your own, right? If so, you should publish these extensions yourself using this guide: Publishing Extensions. Note there is a GitHub Action for this, mentioned at the bottom of the article.

Hey there @sapegin 👋
As @2zqa alluded to above, one of our main goals of Open VSX is to have extension maintainers publish their extensions according to the documentation1. The first step we recommend is to open an issue with the extension owner2. If the extension owner is unresponsive for some time, this repo (publish-extensions) can be used as a temporary workaround to ensure the extension is published to Open VSX.