You can connect Lark 150 to iPad, but you need to notice is  that the iPad is not the same as the iPad Pro.iPad is the same as Phone, you just need to buy official lightning to TRRS cable, then do the connection as below

     https://hollyland-techhelp.zendesk.com/hc/en-us/articles/1500002971381-How-to-connect-the-Lark150-to-the-smartphone-and-audio-devices-

iPad Pro is the same as the computer, you need to buy an audio card, connect Lark 150->sound card-> iPad Pro.