We need to get Sitecore SXA Installed on Sitecore 9.0 Update 2 we are aware that there are 2 ways to do this
1) Using Azure Market place module
2) Using ARM templates
The details are mentioned in this link : https://naveed-ahmad.com/2017/11/05/installing-sitecore-9-on-mircosoft-azure-cloud-as-paas-know-your-options/
But we have already installed Sitecore XP in PAAS and we want install the Sitecore SXA package the way we do in IAAS as mentioned in link.
https://www.rightpoint.com/thought/2016/11/17/install-guide-for-sitecore-experience-accelerator
So questions will we face any issue if we install SXA package in PAAS as we do in IAAS mode