He was trying to see who Jesus was, but could not see over the crowd because he was small in stature.
Berean Standard Bible (BSB)
He was trying to see who Jesus was, and couldn’t because of the crowd, because he was short.
World English Bible (WEB)
And{G2532} he sought{G2212}{(G5707)} to see{G1492}{(G5629)} Jesus{G2424} who{G5101} he was{G2076}{(G5748)}; and{G2532} could{G1410}{(G5711)} not{G3756} for{G575} the press{G3793}, because{G3754} he was{G2258}{(G5713)} little{G3398} of stature{G2244}.
Strong's King James
(3) Zakkai was seeking to see who Yeshua was and wasn't able from the crowd because he's a short height.
The F.O.G
The F.O.G Message
and he was seeking to see Jesus, who he is, and was not able for the multitude, because in stature he was small,
Young's Literal Translation