In Flow, you can select a Sharepoint site for certain Sharepoint triggers or actions. You may open this dropdown and not be able to find your specific Sharepoint site.
Users may not be able to see their specific Sharepoint site listed in the Sharepoint operation dropdown list in Flow. The list is generated from the user's most frequently used Sharepoint sites. You can see your most frequently used Sharepoint sites here under "Sites", under the tab "Frequent".
Therefore, if the user does not frequently use this Sharepoint site, it will not show up in this list.
Users can still use Sharepoint sites not listed by typing in the using the desired Sharepoint site URL as a custom value.
1. Select "Enter custom value".
2. Get the sharepoint site URL
You can find the Sharepoint site URL by going to the desired site in Sharepoint and copying the url from the browser. Make sure you have access to the Sharepoint site.
You can also use any URL from your Sharepoint site. The Flow designer will clean up the URL once it is pasted in.
3. Type the Sharepoint URL directly into the dropdown text box.
The Flow designer will clean up any URL and point it directly to the Sharepoint site.
The dropdown should fill in the Sharepoint site automatically. Please make sure you have access to the Sharepoint site.