Old Blogger photos missing

I can manually replace these photos using the current interface with no problem, but given the number of posts and photos to reference, this would take ages to complete.

There is something about the way the posts used to create links that no longer seems to work when displaying the posts. INTERESTINGLY, the photos show up when I edit the post, but then do not load when I publish the post.

I saw another post from this year suggesting it might be a 'permissions' issue, but the poster simply manually replaced the photos before anyone answered initially. So I'd like to explore this angle if possible. Although to me, it seems like I should, as the owner of the photo (logged in...) be able to see the photos and permissions shouldn't be an issue. Perhaps there is something I am missing.

Thank you in advance for your help!

p.s.

links that don't work look like this:

I can paste that URL starting the http into my browser and the image shows up directly. I can see it when I edit the blog post. However, it does not show up on the published blog for any of the viewers including myself.

p.p.s

I have a feeling this may be related to some of these photos being old google drive photos or perhaps embedded using Picasa when it was still around - if that helps. This was before the migration to Google Photos. I'm hoping there could be a solution other than re-uploading thousands of photos from over the years.