At this link I have a sample form which may or may not be what you need.
https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:89265b19-1ffc-4903-bae1-380e012d1b59
Note: I turned field locking off for all signatures so that your
approach works. You need to check if the open fields are conform with
your signature policies.You basically make a copy of each signingBlock
subform for every signer.I use submit by email for testing - that is the
fastest to see if the logic works prior to subm...