Should (you) bother asking to join these meetings & (is) it (your) place to
If in the process of your day to day tasks you come to realise that it might be more efficient, or beneficial to be included in these meetings then it is obviously relevant to the work assigned to you by your superiors.
There is no harm in pointing out the benefits of being in those meetings to your manager/supervisor, and it is absolutely within the purview of your job to ensure you are working as efficiently as possible.
I don't think any manager/supervisor would have a problem with you suggesting or asking for something reasonable that will have a positive impact on the quality and or efficiency of your day to day work output.
I would recommend starting a short conversation with your manager/supervisor/CTO along the lines of:
Morning/Afternoon 'X' do you mind If I borrow some of your time to
talk about the meetings that the engineers/architects jump into from
time to time.
await response as to if he/she has time to spare at the moment
If they do:
Would it be ok if I jump into the room with them, as some of the
discussions/outcomes would be really useful in speeding up the work
that i'm doing.
If they dont, simply set up a time when you can discuss it.
I wouldn't necessarily just invite yourself into the meetings, because there could be instances when it genuinely isn't useful to you or your work. I'd start with approching a senior to make sure you get an invite into the first 'impromtu' meeting that occurs after your discussion. Then after that the engineers/architects will likely see the value of your presence.