Australia's Attorney-General Mark Dreyfus warns that the National Anti-Corruption Commission legislation will see the body have the ability to tap the phones of politicians, even if they are messaging on encrypted apps.
but i also remember some mention to groups just sending some text, … and they would exploit it somehow by technical exploits alone, no social engineering
https://www.securityweek.com/iranian-hackers-target-academic-researcher-whatsapp-linkedin https://english.alaraby.co.uk/news/iran-hackers-bypassing-whatsapp-encryption-target-dissent-reports
but i also remember some mention to groups just sending some text, … and they would exploit it somehow by technical exploits alone, no social engineering