That is definitely a grate Idea, and indeed it should be already implemented as mobile games are totally different worlds and optimizations, especially if you have no experience.
in the past, I use to get very confused as all the info, tutorials. how do you do, etc... it was mixed up so I couldn't distinguish what you could use in mobiles and what not, as the mobiles need a lot of optimisation for what I see and you cannot put many of those things in there, so it was really stressful trying to filter the info and stuff. if you wanted to learn about mobile platform.
with one section on the forum especially for that, it will be really helpful and it can save a tons of time and research for a lot of people, plus like you said even for learning new tricks for optimisation, monetization and all those staffs, will be definitely something that everyone can benefit from, And the most important everything thing that you find in there you know it is 100% related to Mobiles.
so from me its a must