Check if this tool is available on your plan. You can find all the information about Bitrix24 plans on the pricing page.
How to work with workflows in Feed
You can run some workflows straight from the Feed. Click More > Workflow:
Select the workflow you need from the list, for example, Leave approval.
Complete all the required fields and click Send.
Then the employees authorized to provide approval can approve or deny your request.
Finally, you will get a notification informing you about the result.
By default, there are five standard workflows available:
How to configure the group of approvers
When starting working with workflows, account administrator needs to specify which employees will be authorized to approve users' requests throughout all stages. Click the gear button > Set workflow parameters.
In the popup window you can select an employee who will manage the workflow.
edit a workflow name and description in the Extended parameters section.
configure a workflow in Workflow Designer.