SharePoint not available as Flow Owner

[Ingeborg Hawighorst]

Does anyone know what it takes to add SharePoint as a flow owner? I see that option sometimes, but not for all the flows. I'm currently building a number of flows when SharePoint items in lists are created, but I don't see the option to add SharePoint as a flow owner. 

I have two identical lists on two sites. The ownership and data connection are identical. The flow steps are identical. In one workflow I can add SharePoint as an owner, in the other Flow I don't see that link.

What determines if this link is visible or not?

[#2]

Very wird, if both workflows are workflows attached to a list, the SharePoint tab should appear in both

[#3]

Check your site / list permissions, make sure you are same level of permissions at the SharePoint level.

[#4]

Permissions are identical in the two sites. I am a site collection admin and member of the Site Owners group. The SharePoint Workflow service account is also in the Site Owners group.

[#5]

Are both sites Office 365 Group sites, or might one of them be using the Classic infrastructure?

*Edit* I think this point can be disregarded, my version of Flow doesn't seem to care what the site is, SharePoint is an option for both types.

[#6]

Did you find any solutions to this? Running to this issue currently.