Site-to-site VPN question.

[Glacier]

Hi

I have a question i'm sure someone on this forum will be able to answer.

I company have a main office and 9 smaller remote offices.
Each of the remote offices are connected to the main office via an IPsec Site-to-Site VPN.
This has worked fine until now.
However now the pc's in the each remote office, have to be able to communicate with pc's in all of the other remote offices.
How to best solve this?
Do we create site-to-site vpns to each of the offices (10 vpns per office), is it better to route the "remote office traffic" through the main office or is there a different solution?

The routers used is a mix between Pfsense boxes and Meraki boxes.

Best Regards
Esben