Is there an Adaptor to charge my iPad usb-c with my iPhone lightning cable?

Technically, it is possible to charge an iPad from a USB Power Source that has the older USB Type-A connector - but not with a Lightning cable. Instead, you would require a USB Type-A to USB-C cable.

By example:

• mophie USB-A Cable with USB-C Connector (1 m)

https://store.apple.com/xc/product/HN892ZM/A

However, while technically possible, this charging arrangement comes with a penalty - in that the maximum charging rate will be reduced to 12W (i.e., 2.4A @5V). When charging with a suitable USB-C Power Adapter with a USB-C/USB-C cable, as supplied with your iPad, the maximum charging rate is 20W - allowing the iPad to charge both faster and more efficiently.

As such, unless you have a very specific reason to charge your iPad from a USB Type-A power source, you would be best advised to use a USB-C Power Adapter and USB-C cables to charge your iPad.

Most models of iPad require a Power Adapter rated at 12W or greater to reliably charge. 5W Power Adapters intended for older models of iPhone are inadequate to charge an iPad; if the iPad charges at all, charging will be very slow. Recent models of iPad are supplied with a 20W USB-C Power Adapter.

Be aware that many computer USB ports cannot source sufficient power to charge an iPad. Unless explicitly designed for charging connected devices, computer USB ports are typically limited to 0.5-1A @5V (i.e., 2.5-5.0W).

Not really. That would be something rather specialized and nothing that a USB-C to USB-C and USB-A to USB-C cables could also do without requiring an adapter. On top of that, Lightning is proprietary and maybe the most it could do would be to provide power without providing a data sync.

There is something that actually provides USB-C male to Lightning female, but it's only for use in connecting to a Lightning audio device (like Apple's Lightning headphones). It's very expensive too.

https://www.anker.com/ca/products/a8178

No.

And no point either. Unless you have a very old charger brick, the USB-C cable from your iPad should be able to be connected to the iPhone power brick directly.

All iPhone charges for almost 4 years now have been USB-C.