New camera

After looking at your journal, you appear to have sorted this! The only Blips with missing data, are montage ones, and this would be normal for such creations that are a combination of different shots taken a different times, and likely with different settings.

One of the common causes for the EXIF data not being there, is that you're editing software removes it. If that's the case, there will likely be a little box somewhere in the options/settings of the software, that needs a tick placed (or removed).

If you have resolved this, then please do update your question with the solution. It could help other users of the site, and save their time.

Have fun with that new camera!

Best wishes.

Thank you - it seems to add the data if I use manual settings, but not if I use "auto" - will have a look at the software options.