Many of our posts have subtitles which usually follow under title. We want this data saved as a special field. We thought we can use a custom field with "after_title" context, but this option does not appear. Looking through support tickets there seem to be a compatibility issue with the block editor which has not been resolved yet.
Could you please advise what we can do? Having this field under content is not very convenient. On the side as well. Is it possible to build a custom block with custom input field? I cannot figure it out, it looks like only static content custom blocks can be created.