The minimum number of approvers per OKRs is 1. However, there's no such a restriction that limits the maximum number of approvers or reviewers per OKR.
Here's how to increase the number of OKRs approvers:
Navigate to the OKRs for approval left sidebar menu
Browse for any OKR that has a DRAFT status
Click the Send for approval button
Select Reviewers from the top down menu
Click Send for approval
Pro-tip:
The number of approvals for OKRs in "In review" can also be adjusted. Here's how to do that:
Navigate to the OKRs for approval left sidebar menu
Browse for any OKR that has an IN REVIEW status
Select an OKR by clicking on it
Click on the users avatar and select more approvers
Click Send for approval
Pro-tip:
Although there's no limit to the maximum number of approvers per OKRs, a good practice is to invite only those teammates that you collaborate with in terms of achieving a common Objective as well as decision-makers whose job is to make sure the OKRs process goes as smooth as possible.