Thanks for reaching out. We're here to help. I'd love to help you figure this out.
You can install the Adobe Lightroom desktop app. When you launch Lightroom desktop for the first time after installing or updating, the existing Lightroom Classic profiles and presets on your computer are automatically migrated to Lightroom.
This happens in the first launch only, so any new presets or changes you make to the existing ones will not migrate.
The workaround to this is simple; if you are using the Lightroom Classic & Lightroom mobile in sync, you can apply a preset to a raw image and let it sync to the cloud and eventually to Lightroom Classic.
Once the image is synced, you can create a new preset with the existing setting on the image you edited on Lightroom mobile with a preset. This will work both ways.
Let us know if this helps,