solodeji Hi there - Lindsey here from Support. I hope you're well!
Yes! You can absolutely use our caching on your site so long as it is integrated with us. All you need to do to enable this is to head to Leap > Caching and enable caching from there. :-)
In addition to this, I would also recommend completing your initial Leap setup should you be concerned with site speed. All you need to do is select 'Complete Setup' from within Leap and our optimisation process can begin. You should also have access to this for a limited time (39 more days as of today from what I can see) while we review your site.
If you have any issues doing so, please let us know.