iPad
My iPad can not send texts messages to android phone
iPad Pro, iPadOS 15
iPads are NOT iPhones/smart phones.
To send SMS messages to other non-Apple phone, you need the use/purchase of an iPhone.
Tap and read these links below.
Make and receive phone calls on iPad - Apple Support
Make and receive phone calls on iPad - Apple Support
Set up Messages on iPad - Apple Support
Set up Messages on iPad - Apple Support
What is the difference between iMessage and SMS/MMS? - Apple Support
What is the difference between iMessage and SMS/MMS? - Apple Support
How to forward SMS/MMS text messages from your iPhone to your iPad, iPod touch or Mac - Apple Support
Best of Luck to You!