I literally mentioned that in the same post you're quoting.
And no, he didn't even bisect Mael.
Zeldris just cut his stomach with a darkness blade and
proceeded to get one-shot by his saucers while in an even more enraged state.
Honestly, I don't even see the point in arguing. There's still no comparison to actually be made between Demon Tristan, whose multiplier isn't even known since he's just a half-goddess, and Meland.
For the last time, this isn't confirmed. Ya'll are taking
that summary I gave way out of context.
Interdimensional range is fine.