my main account is R1.. however i just bought overcooked wich is r2 version.. if i create r2 account and dl the DLC of the game, then i change back to my r1 main account, will i be able to access the downloaded dlc ?

You have to play the game on your R2 account to play with the R2 DLC

It should work once you set your PS4 as primary console for the R2 account.

Eg. I downloaded MH World which is R1 (and DLCs) .. then playing them while logged in to my SG account

just activate primary ps4 for all account in your ps4. unless you are game sharing with buddy/family member.
PSA: you can have more than 1 account activate in 1 PS4(up to 16 account I believe). Just that you can assign only 1 active PS4 per account.
is that so hard to understand?
jeez so many muka bulu addict in Malaysia x akan simple english also cant understand
i aint talking in some ol english languange

my ps4 have 5 account. 3 are active to my ps4 while 2 are acive to my bro ps4. coz we are sharing PS+
mine(account: MY spare, US, EU 1 active) my bro(account: MY main, EU 2)
why pay rm20-30 extra to just play the same game & I dont give shit about that game's dlc.
and I dont speak chinese so dont need chinese ui.