My exp w/ automated distribution for my products:
YT - highest reach (even without warmup). Least CVR
TT - must put manual efforts. vids will be at 0 views jail at first. A good one will work only for a few days. Has the potential but the most unpredictable imo.
IG - better than both. warmup > merge automation + manual. Less strict than TT. Meta has the highest audience btw
Not bad cuz it takes 0 hours to manage.
Atleast im getting the right audience on YT
(also doing manual distri btw)