Front-end developer to get website working on all devices

I have a html/css/javascript website that has 2 pages and various pop-ups and calendly functionality. The issue is QA it does not work on my iPad in Safari or Chrome. I need proper QA and pixel-perfect standards. So this website needs to work on all devices and browsers.

I am happy enough about how it looks on Chrome on my iMac 27 inch and iPhone X. I have no confidence this is working on all browsers and devices without it being messed up, as this is the first website that does not work on my iPad which is very strange.

I need a developer to take over and get this fixed asap. It also needs QA support at your end.

Figma source file and prototype will be supplied.

Note: There were minor content and spacing changes that I made that don't exactly reflect Figma so we are going with the spacing and content in the latest live website.

Please include URLs of previous html/css/javascript websites.