Thank you for reaching out. We are sorry to hear you are unable to see the + icon to install plugin. We would request you to please share the screenshot of your About XD info page.
Please also try signing out of XD, Creative Cloud desktop app, restart the machine and then sign back into Creative Cloud desktop and launch XD.
Let us know if that helps.
my plugin plus sogn is not herehow can i download plugins in x
We are sorry to hear you're unable to see the plugin icon to install the plugin in XD. We would like to confirm if you've tried the below steps-
I will try my best to help.