I made a (not yet merged) pull request for gallery-dl: https://github.com/mikf/gallery-dl/pull/6607
Or, even simpler, you can just do this to fetch the entire blog content, and pick all the relevant parts yourself:
curl -X POST 'https://api.lofter.com/v2.0/blogHomePage.api?product=lofter-android-7.9.10' -d 'blogdomain=<blog_name>.lofter.com&offset=0&method=getPostLists&limit=10000'
