Have you enabled Offer management in your Freshteam account? If not, Head to Settings > Preferences > Recruit. 
Once that’s enabled, this how your offer drafting page would look:
- Name the approval stage to give clarity on who is approving it.
- Choose the approvers from the drop-down list.
- Choose if you want mandatory approval from everyone, or leave it as an option. Once you have added all the stages, click on Initiate Approval to begin the process.
- You can also remind the approver by sending reminders to approve the offer.