Providing more details will increase your chances of getting useful responses.
Are you asking how to create an element with a fixed position on a web page running on the iPad’s Safari web browser ?
Yes, css position:fixed does not keep an element in a fixed position. One example would be bottom:0
Yes, position:fixed does not work on mobile Safari.
Some kind of trick is needed to achieve something similar. I have seen different workarounds on the web. Here is one:
Fixed positioning in Mobile Safari
A google search could offer other options.