First of all, make sure you have an iPad that is compatible with Logitech Folio Touch. Logitech Folio Touch works with the following iPad models:

Folio Touch for iPad Pro 11-inch (1st, 2nd, 3rd and 4th generation)

• iPad Pro 11-inch (1st generation) (Model: A1980, A1934, A1979, A2013)
• iPad Pro 11-inch (2nd generation) (Model:A2228,A2068,A2230,A2231)
• iPad Pro 11-inch (3rd generation) (Model:A2377,A2459,A2301,A2460)
• iPad Pro 11-inch (4th generation) (Model: A2759, A2435, A2761, A2762)

Folio Touch for iPad Pro 12.9-inch (3rd and 4th generation)

• iPad Pro 12.9-inch (3rd generation) (Model: A1876, A1895, A1983, A2014)
• iPad Pro 12.9-inch (4th generation)
• iPad Pro 12.9-inch (4th generation) (Model: A2229, A2069, A2232, A2233)

Folio Touch for iPad Air (4th and 5th generation)

• iPad Air (4th generation) (Model: A2316, A2324, A2325, A2072
• iPad Air (5th generation) (Model: A2588, A2589, A2591)

Ensure you have iPadOS 13.6 or above, as mouse and trackpad functionality was first introduced with this version. Now connect the Folio Touch with the iPad using the Smart Connector and you're ready to go.