I need to use the full lightroom with all its features (including the creation of libraries)
The terminology you are using is confusing. Are you saying you want to use Lightroom Classic? Or are you saying you want to use Lightroom (which stores your photos in "the cloud")? Can you state the exact name of the software you want to use that has all these features you want?
On your iPad, you can use the Lightroom app to edit photos, and then those edits will be synchronized back to Lightroom Classic. However, the Lightroom app on your iPad does not have ALL of the features of Lightroom Classic.
So, can you be specific? What features of Lightroom Classic do you really really need on the iPad?