question

I don't think that your going to get an answer about this from Victron, as it just depends on how smoothly things go along the way and if the scope of work is varied.

Also in the community guidelines I believe that there is a note stating to refrain from asking questions related to product or firmware release timing.

But if you're keen to get the IMT irradiance sensor going now, then maybe consider running the latest Venus beta firmware that already supports it - I have one running in my system and it works great!

Example VRM log from today (with temperature and wind speed hidden to reduce the clutter);