I accidentally clicked the “your iPhone has virus” pop up

So today while browsing safari I got a pop up saying my iPhone had been infected by virus and told me to download a malware protection app ( I don’t remember the name )

i did downloaded it out of polished and it told me that my iPhone have Trojan horse and showed me a ‘clean phone’ option so I clicked on it and then it asked me to get the premium version but then I deleted the app.

Please let me know if any damage had already been caused to my phone and what I should do now?