My understanding is that the integrated linux terminal is not supported on all processors like snapdragon ones and also is not available on all manufactures like Samsung. Therefore this approach covers a much bigger audience.
I think it was only available on Google Pixel until recently. As far as I understand, some Samsung Exynos devices support it (e.g. Z Flip 7, non-US S26 with Exynos), but not Snapdragon devices, which don't seem to support non-protected VMs yet:
Error code: java.lang.UnsupportedOperationException: Non-protected VMs are not supported on this device
I can find it on my S25fe with exynos android 16/oneui 8.0 if I search for it in the setting but is greyed out. I wait for 8.5 to see if it is enabled then and is the only time I'm happy to have an exynos device!
Error code: java.lang.UnsupportedOperationException: Non-protected VMs are not supported on this device