I would tend to question the Agriculture tech, not that Finland didn't know how to grow food, but because the climate was so ill-suited for massive food growing. Basically, I might hand them the 1918 levels of most of those techs you mentioned, but the 1936 techs are meant to be "cutting edge" at the start of the game. Finland was industrialized to a degree, and had a modern educational system, but it wasn't on the forefront of technology either. Even Germany was considered "behind" on some of its industrial and agricultural practices, not that the game reflects it.
Note that I added several starting techs for Hungary at one point, but later reverted back to the vanilla game values for balance:
Radios - Hungary's R34 radio was already in military service by the start of 1936, but it takes until 1937 before you can even unlock the prerequisites to research them in-game. I give them the underlying electro-mechanical and radio technology techs to unlock Radios, but don't actually give them radios, so it takes one research slot to get them.
Motorized Infantry - Hungary's motor vehicle production capabilities were limited, but it had already started motorizing its cavalry and creating "fast" divisions with partial motorization by 1936. They did purchase some Italian trucks, which were more durable than their own, but used some of their own as well. I gave them the prerequisite cavalry techs to unlock the MOT tech, but didn't actually give them the MOT tech itself.
I also gave them the tech to unlock DDs, mainly for the ability to build or upgrade a port. They were part of Austria-Hungary, with something like the 5th most powerful navy in the world going into WWI, but both Austria and Hungary were denied even a single port in the surrender terms. There would have been no naval development since WWI, but they should still have the knowledge, industrial capabilities, and/or plans for WWI level ships.
That was it. A handful of techs, mostly Cavalry techs which are only useful for unlocking MOT. Finland wasn't light years ahead of that, so I'd be very sparing on what you give them, and err on the side of caution rather than give them everything that they were even remotely capable of doing.