If you have Lightroom Classic and Lightroom CC on your computer and are trying to sync your previously installed presets to mobile, ensure your are signed in to your Adobe account across all three versions. If you continue to have trouble syncing your previously installed presets from your desktop to your mobile phone, I recommend reaching out to Adobe support for further assistance!
Mobile presets are installed and formatted differently than standard presets. Unfortunately, at this time we do not have mobile presets available for download. However, the great news is we are currently working on creating them and hope to have them ready in the near future, so keep an eye out!