I am wondering if I can transfer an existing site like https://besthookahflavors.com on wix platform? if yes what is the process.
Your question isn't related to the Wix Forum, you are better suited asking Wix Support.
https://support.wix.com/en/article/contacting-wix-support
Also Planning to move: https://sastamobile.com.pk/ , But not sure if SEO is good on Wix or not..