[SalesForce] Record editability in approval process

I think what you want is :

1) Submitter1 edit and submit the record to Approver1

2.1) Approver1 review/edit record and then must Approve --> the record is going to Approver2. Your record will still be in "Pending" for Approver2

2.2) Approver1 reject --> go to final reject actions, unlock records and Submitter1 will have to submit again

3.1) Approver2 approves --> your record is now approved, do whatever you want (field update, email alert)

3.2) Approver2 rejects --> you have 2 options here, go back to step1(=Approver1) OR go to final reject actions. In final reject actions you can unlock your record(+ field updates), so the oirignal submitter can edit and submit again.

Of course in your approval process setting, you must to enable "System Admin AND approver can edit records"

I hope that can help

You can assign "Next Automated Approver" to the user lookup fields only.

For example, you can assign it to a Standard user Lookup field "Manager" or you can assign it to custom user lookup fields which you have created.

Approval requests are assigned to an approver from the specified field. You can select only a hierarchical relationship field, such as Manager.

More info on the Next Automated Approver Assignment can be found here