The issue is that Android is open while Apple seldom talks about their security issues.

This might make Apple look like the more secure option but the reality may be different because Android is more scrutinised.

If you are sceptical consider these examples: (1) some versions of Apple silicon have unpatchable security defects, (2) Apple at one point decided to not contact up to 500M users affected by a supply chain attack in China due to "language difficulties".