Bivol would destroy canelo.

Bivol's fleeter of both hand and foot than Clenelo, isn't way past his prime like Kov, hasn't been stopped x 2 in his last 6 fight and very nearly stopped for a third time in one of them by a rank novice, isn't a heavy vodka drinker, and he would win on points.

With the exception of Pascal who a much closer to prime Kovalev stopped (and obviously that Kov would've brutally stopped Clenelo too), Bivol has performed better against all the common opponents he shares with all these elite LHWs

18-0 Eleider Alvarez W12MD Isaac Chilemba (many feel Chilemba won)
19-0 Eleider Alvarez W10 UD Robert Berridge (no KDs Berridge took the fight on late notice)

13-0 Bivol WUD12 Isaac Chilemba (Bivol won at least 10 rounds IMO)
8-0 Bivol WTKO4 Robert Berridge (Bivol dropped Berridge x 3)

28-0 Andre Ward WUD12 Sullivan Barrera

12-0 Bivol WTKO12 Sullivan Barrera

20-1 Sullivan Barrera WUD10 Felix Valera (Valera dropped Barrera)

6-0 Bivol WUD12 Felix Valera (Bivol dropped Valera x 2)

23-0-1 Sergey Kovalev WKO7 Cedric Agnew

10-0 Bivol WTKO4 Cedric Agnew

22-0 Eleider Alvarez WMD12 Jean Pascal

14-0 Bivol WUD12 Jean Pascal (Bivol schooled Pascal)

23-0 Marcus Browne got dropped x 3 and stopped by Pascal

21-0 Marcus Browne was dropped by 18-1-1 Lenin Castillo

16-0 Bivol WUD12 Lenin Castillo (Bivol schooled Castillo and is the only man to drop him)

19-1 Sullivan Barrera WUD10 Joe Smith Jr. (Smith dropped Barrera whereas Bivol shut him out)

15-0 Bivol WUD12 Joe Smith Jr. via schooling

Pretty much, if not all, of the aforementioned fighters have or had a significant weight advantage over Bivol.