[4.3.6] Json-LD Breadcrumb isn't present

[Emaxo]

As the title say, my site has no breadcrumb specified inside the json-ld schema so google isn't showing a rich-snippet for my site.

How can i specify the breadcrumb inside my site?

[bfarber]

It should happen automatically. If it isn't, you may wish to submit a ticket.

Note that you may wish to check the page source using a default unmodified theme to rule out a custom theme being the problem first.