You also mention
Did you Report an issue?
I searched and found FP4 not connecting to network thru Esim (#8478) · Issues · e / Backlog · GitLab but otherwise I do not see an issue as you describe.
However, sorry to say, all your forum reports seem strangely missing exact details.
Is this specifically the unresolved issue?
As I understand Mobile data is only from one of the SIM slots. However exactly how this works with an eSIM I am uncertain, but I would assume same or similar.
I think you have said both SIMs are from the same carrier, did you disclose the carrier in another thread, or did you search the carrier in [LIST] Carriers that work or do not work with /e/OS country-wise