Both the admin and the owner can view the plan details where as only the owner of a Cliq organization can upgrade the plan.
You can view and upgrade the plan details of your organization following the below steps:
In the Admin Panel, under the Organization module, click on Licensing.
You can see your current plan and unlimited plan details in the Licensing page.
In the right top corner of your Licensing page, click on UPGRADE.
By doing so, you'll be navigated to Zoho Payments page where you can upgrade your Cliq subscription.
Note: You can also use the *UPGRADE* button in the top right corner of the Admin Panel next to your profile picture.