The Soviet units in the picture would not be able to support their comrades. They are either in ZOC and most importantly do not have LOS (only over ice lakes). Adjacent ranged support is only allowed if the attacker is in an ice hex (see 10.3.6).
Edit: perhaps there are Soviet mortars or off-map artillery that can help? If so, they could target a stack with more than one Finnish company to get a better chance of causing a suppression.
Thanks for chiming in, David. Sorry for my delayed response. The power was off here for the last 24 hrs and just came back on an hour ago. Luckily the temp was on in the 40's outside so no one was forced to build bonfires. This is the first time we've lost power in the new house so it was actually good practice before the inevitable snow hits.