On the surface level, 7% (14 of 200) resource allocation to iOS and Android apps seems to be skewed. I am curious to better understand where the remaining engineering resources are allocated. I would assume that a significant majority of the engineering division is allocated to building and supporting the marketplace backend, APIs, and DevOps infrastructure.

Typically for a company that is scaling, I would expect 30% resource allocation towards mobile app development and 70% towards backend and devops. However, there is no golden ratio and the percentage of developer allocation is not necessarily the best indicator for your use-case, so I would not rely on a ratio benchmark too much.

In my opinion, a better indicator would be your current vs expected feature velocity and the size of backlog on your product roadmap.

Perhaps, another way of evaluating this situation is by projecting how much more and how much faster you would be delivering features if your team was doubled to 28 or quadrupled to 56.