Self-scans reveal that Pegasus, an invasive and powerful spyware that can secretly control phones and track owners, might be more widespread than previously thought. It was discovered on the phones of everyday phone users.
From wikiHow: How to Check Your Smartphone for Pegasus Spyware
Yes. Maybe. Sometimes. Much more likely if you do an encrypted backup and decrypt it with the tool.
Regardless it’s not guaranteed to pick them up.
May give it a try one of these days. But knowing nothing of the reliability of the tool in detecting the malware decreases my motivation to even try I must say.
The warning was meant for you.