Request Design Input for APISIX migration

[sampy2308]

I have a old API proxy system which I want to upgrade to Apache APISIX. in the context I want design the new system in the same way the existing system behaves.
Current System:-

in current system we have multiple OpCos and brands (brands are nothing but different Systems/apps) like Brand A, B with Opcos X, Y , Z (Opcos are different region)
Opco X Brand A: uses API version V2
Brand B: using API version V5
Opco Y Brand B: using API version V3
Opco Z Brand A: using version V4
Brand B: using version V5

Current API versions:

V1:
API1
API2
API3
API4
API5
V2:
API3
API6
V3:
API4
API6
API7
V4:
API5
V5:
API2

Invocation Process: Example

for Opco X Brand B (using Version V5):

if Opco X, Brand B access API2, it will be using from V5 as its present in V5.
if Opco X, Brand B trying to access API5, it will be using from V4, as the current version for Opco X Brand B is V5 so it can fall back to previous version if the API is not found in the current specified version which is V5 in this case.
Same way If Opco X, Brand B tray to access API1 it will be using V1.

For Opco X Brand A (Using Version V2)

If Opco X, Brand A try to access API6, it will be using V2
If Opco X, Brand A try to access API7, then not allowed as its not present in V2 or V1
If Opco X, Brand A try to access API2, it will be using V1

Need to design the above scenario for a migration .. if anyone can assist I will be obliged