Remembering 7Two, 7mate and 7flix all used to have separate V/Os, but they ditched them at the presentation re-launch in mid-2020 (along with Seven’s long-time main channel female and other male). 7mate’s remained as did the main channel’s long-time male, but 7Two’s ended up just being voiced by the main channel’s male and new female and 7flix the new female.
So maybe they’ve increased their creative team’s budget or a post-coronavirus thing?
I have heard at least two new male V/Os in recent weeks, first for AFL and some Voice promos (though the long-time male has still been doing some and other promos) and a second one (I think the one you’re referring who was on 10 a few years back after their long-time one went to Nine) for the BB promos.