While Dektol can be used for both Prints and film (using different dilutions), you likely will get better resuls using D76 for film. To the OP, I would suggest sticking to D76 for film if you find it available, where you are.
i have never used d76, but i have used sprint film developer, xtol, dk50, ansco130, caffenolc, and maybe another developer or 2
and dilute dektol gives up a negative as nice as the rest of them. over the years i have heard commentary that it will give golf ball sized grain / terrible negatives
but those comments, like a lot of things on the internet are not true. certainly the OP should stick with d76 ( or anything else he/she wants ) but it SEEMED the OP
asked for a universal developer ( film and prints different dilutions ). unlike a lot of folks on the internets,
i actually suggest things i have done myself, and i am not speculating
&c. i've been using dektol with with film since 2014, and ansco 130 or one of its universal developer cousins since the 1990s. there really is no problem working with 1 developer for film and prints. i've made prints
that i have sold for $$ ( both enlargments and contact prints ) asd well as things found in libraries/archives ..
and scans/digital prints that have been pritned very small and very large ... no issue.
one just needs to realize that not all the hype ( negative and positive alike ) is true, and a lot of the time people with no experience regurgitate the same old same old again and again and again ...
with no clue about what they are talking about.