Flow Designer : How multiple group approvals in parallel and wait for till all group approval are approved

Hi All, 

We are implementing flow designer for one of the catalog items and we have below scenario and not sure how we can solve this using flow designer :

Scenario : We have to trigger approvals to multiple groups parallel (dynamically it can be 2 groups, 3 groups, 4 groups, etc), depending upon the request. and we have to wait till these multiple group approved.

Here i have used the paralle flow activity in the flow designer for the sending the approval for mutilple group.

Issue 1:  if one group is approved and other group is not approved , it is showing no longer approval required for other approved.

Issue 2 : And also how to add the join activity here because all these group approval need to be approved.
could you help me in resolving these 2 issues or other way to implement these?