Hi,
For our internal needs, we need a on-fly creation of a related entity. Basically, this is the feature discussed in #2164.
I made a small development without pretension, but it works well. You can find it here: https://github.com/versgui/EasyAdminBundle/commit/4bd2b71cc9ba9a6152f824b5d89b1216f6d8b3a0 (your feedback is welcome).

For the moment, it's only implemented on the autocomplete field.
The biggest gap remains the recovery of the ID of the newly created entity so the user don't have to do the search immediately afterwards.
Well, I must say, that this would be a great thing in EasyAdmin :).
Create a PR ;)
I worked on this in the past https://github.com/EasyCorp/EasyAdminBundle/pull/2164 and this feature is at the top of my TODO list :)
Hello @javiereguiluz @yceruto i Need This Type Of Feature Can You Please Share how much long Time To Available In Stable Version ?????
This feature is nice, but it will require to add another one first: "allow to show and make work new/edit forms in modals", next we would ready to work on this.
Now I'm focused on File/Image Upload feature, after that, I'm not sure when I can do it :( sorry
PR is welcome :)
@versgui thanks for your proposal. However, we've decided to not add this feature in EasyAdmin 2 ... and add it instead in EasyAdmin 3. There is no estimated date when this feature will be included (that's why I'm closing this), but our intention is to do it, so you can expect it eventually. Thanks!
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I worked on this in the past https://github.com/EasyCorp/EasyAdminBundle/pull/2164 and this feature is at the top of my TODO list :)