CalyxOS seems to support some motarola phones and two fair phones https://calyxos.org/docs/guide/device-support/. LineageOS seems to support a wide array of devices (including some from the Chinese brand Xiaomi) https://wiki.lineageos.org/devices/. However GrapheneOS only supports pixels https://grapheneos.org/faq. You could always just buy a pixel second hand if you don't want to support google. WeChat should work on all of these ROM's as they are just modified android.
That's not the only way, you could install a de-googled android ROM like LineageOS, CalyxOS or GrapheneOS.
From the context of the video this was commented on I think they believe that because android gives users more freedom and iOS is more locked down iOS is communist because communism=no freedom. They may also think that iOS is communist because the user experience is always the same instead of varying greatly like android and communism=everybody is the same. Either way this person has no idea what communism is.