No, their devices have very poor updates and security features.
Fairphone 5 and earlier have end-of-life kernels without security support. Their newer devices will too. They lack proper firmware, driver and HAL updates too.
There's no proper secure element and many other missing security features.
Fairphones are designed and made by T2Mobile. Fairphone aren't the ones designing the devices and aren't in a position to make the massive improvements needed to meet our requirements.