I had cause to need WhatsApp a bit over a year ago: it requires a device that runs iOS, or Android with Google Play. I just assumed I could get past this, but the signup flow refused to run on LineageOS with MicroG via Waydroid on my laptop—wanted an authentic, Google-approved environment. Maybe that can be worked around; I don’t know. Subsequently you can run WhatsApp Web… but you can’t make calls that way, and if you don’t run it on an actual phone for two weeks, it’ll boot you.