Instead of making it as a “variant race,” I recommend you just use the base race as a template and use that as a guide to set up your own ancestry. There are some funky interactions with that race because of all the Options and it’s easier to get them all right if you can see how DDB set them up.
Can you make a homebrew draconic ancestry for dragonborns?
Yes.
Copy race as a Variant, make edits. Save.
<< USEFUL LINKS >>
Support >> Site Rules || Bugs & Support || Help Portal || Contact Support
Homebrew >> Rules & Guidelines || FAQ / Guide || How To Use Snippets || How To Use Tooltips || More Tutorials
My YouTube >> I sometimes make video guides and tutorials for D&D Beyond which you can see here.
Instead of making it as a “variant race,” I recommend you just use the base race as a template and use that as a guide to set up your own ancestry. There are some funky interactions with that race because of all the Options and it’s easier to get them all right if you can see how DDB set them up.
Creating Epic Boons on DDB
DDB Buyers' Guide
Hardcovers, DDB & You
Content Troubleshooting