As you define the event settings on the FAI Setup Guide, you’ll notice the Focus Duration and Specificity is changing on the bottom two sliders which are greyed out.
For example, a Flat Gravel Race is quantified as having a Focus: Rouleur (6 min power) and Specificity: Polar (more threshold).
If for any reason the Event option isn’t working for you (we can figure out why when you post a screenshot of your Setup Guide settings), you can alternately switch to a Goal and enter an improvement in watts for the target Focus Duration and Specificity.
If similar result with a Goal target it’s likely due to your current Training Load (TL) and the Max Weekly Hours you can commit to.
In either case post your desired Event settings so we can better advise you of the next steps.
In the meantime, you should find my Onboarding post for newbies of value –
Onboarding steps for Xert Trial users and newbies - General - Xert Community Forum (xertonline.com)