Thru axles are not as simple as skewers.

You've identified 2 parts of the variables;
(1) axle diameter and
(2) hub width (inside width)

but of course, there's more to the story.
(3) Thread pitch. Either 'fine (1.0)', 'medium (1.5)', or 'coarse (1.75)'.
(4) axle length. This is the OUTSIDE width that accounts for the width of the frame/fork + hub width.

Not sure what you mean by fully 'catching', but I assume you mean that it's threading in, but not reaching the outside of the frame. In this case (if it's true), your axle is too short (#4).

Thanks for the reply. Yes, its not reaching the outside of the frame and appears to be short. Given this, do you know of a compatible quick release thru axle that would fit?

This is one of the more helpful guides I have seen for figuring out what your thru axle size is. https://robertaxleproject.com/what-axle-do-i-need/

Don't accidentally search for Robert Axel instead of Robert Axle.

As others have already said there are multiple parameters you need to look at to figure out the correct size.

Another option is something like the Rapilock axles. They can be converted to work with almost any bike as long as you get the right type. In your case the road version should work. https://www.amazon.com/...9?crid=125Q0O5L5UZXI

To start, let me know what the outside width of the frame/fork is.

They're may or may not be a solution for you. I've run into this sort of issue before and haven't been able to find the right combination of specs to work with my frame.

you are now the second person to recommend this product. I just ordered them so fingers crossed....

First, use this to find the exact details for the TA's you need for your frame.
https://robertaxleproject.com/axle-finder-2/
Second, find the correct DT Swiss Lever TA that matches your specs.
https://www.dtswiss.com/...bs-and-rws/rws/12-mm