How to Display Custom Token in Rules UI Data Selector?
Here are 2 options you may want to try:


Rework your Rule so that part of the logic of it you move to another (new) Rules Component (which uses "node" as a parameter) and then in your rules component check in its conditions if those tokens become available.
Use the Conditional Rules module so that within your Rules Action you can add a "condition" where these tokens may show up.


As per your "It appears the token will appear in the field where I can select an email to be sent", either of both options should work, if you use those options AFTER the Rules Action where you can already use the token for sending an eMail.