Hi there GregCa, the "Mobile" feat is a part of the Player's Handbook and not a part of the Basic Rules / SRD offered by Wizards of the Coast for free.
To use the Mobile feat on a character you can purchase the Player's Handbook on D&D Beyond, or just the individual feat you're looking for. The amount spent on an individual item such as this will decrease the cost of completing the full book later by the amount spent.
Alternatively, you can use our built-in homebrew system to recreate the feat yourself, using a physical copy you own as a guide for entering in the content for private use.
Regardless of whether "Use Prerequisites" is on or off I can't there are only a couple of Feats available
https://imgur.com/a/bC3sO5r
for my 9th level Barbarian. I should be able to pick the MOBILE feat which has no prereqs?
http://ddb.ac/characters/26790389/0n67wk
Hi there GregCa, the "Mobile" feat is a part of the Player's Handbook and not a part of the Basic Rules / SRD offered by Wizards of the Coast for free.
To use the Mobile feat on a character you can purchase the Player's Handbook on D&D Beyond, or just the individual feat you're looking for. The amount spent on an individual item such as this will decrease the cost of completing the full book later by the amount spent.
Alternatively, you can use our built-in homebrew system to recreate the feat yourself, using a physical copy you own as a guide for entering in the content for private use.
Hope that helps!
Never occurred to me I was missing the PHB but that makes sense. thanks