I'm eligible for X-Plan as my employer is a Ford partner. I contacted four dealers and they all said they do not offer X-Plan pricing at the present time due to product shortages. I guess it's the dealer's option to offer it or not.
For the XL I ordered with few options, X-Plan didn't make much difference. Even the "3% under invoice" some dealers offer in these forums wasn't that much less once I added in doc fees and travel expense.
Here's what I have learned:
You should have a Ford Partner code to log into the Fordpartner.com website. From there, click on "Shop Ford", then on the next page, click Pricing & Incentives.
If a model is listed, Ford is offering it and the dealership should honor it if they participate in the program.
Right now, the Maverick is not listed. This is often the case with new models, but it could also appear at any time.
If you order today, if it appears on the site before you take delivery, you should get your PIN and papers ready.