USB c hub for lighting iPads

In addition to the link yo the appropriate products page, helpfully provided by ProustGiulio, you may also find this information to be helpful in identifying the correct adapter for your needs:

https://support.apple.com/en-us/HT202044

For your model of iPad, with a Lightning connector, connecting to an external monitor over USB-C and a USB hub isn’t supported. Instead, you’ll need a Lightning to Digital AV Adapter - and a good quality HDMI 2 interconnect cable. More information can be found here:

https://support.apple.com/en-gb/guide/ipad/ipadf1276cde/ipados

Sorry, it not at all clear what - or how - you are trying to connect cables or accessories. Without this information, including details of your iPad model, it is impossible to provide any advice.

This help page might help you to articulate your question:

https://discussions.apple.com/docs/DOC-5931

Start here and choose the best option for your needs:--> https://www.apple.com/shop/accessories/all-accessories/power-cables?page=1&f=adapter-hdmi&fh=459d%2B45b0%2B3058

Regards

Giulio