{{{},..10 elements...,{}},{{},...44 elements...,{} aso.

{{{},..10 elements...,{}},{{},...10 elements...,{} aso.

expr = Range @ {6, 3, 14, 9, 5}

{{1, 2, 3, 4, 5, 6},
 {1, 2, 3},
 {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14},
 {1, 2, 3, 4, 5, 6, 7, 8, 9},
 {1, 2, 3, 4, 5}}

Take[expr, All, 2]

expr[[All, ;; 2]]

{{1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}}

Needs["GeneralUtilities`"]

TrimRight[expr]

TrimLeft[expr]

{{1, 2, 3}, {1, 2, 3}, {1, 2, 3}, {1, 2, 3}, {1, 2, 3}}

{{4, 5, 6}, {1, 2, 3}, {12, 13, 14}, {7, 8, 9}, {3, 4, 5}}