Vim: is there an equivalent of :tab that executes a command and splits (or vsplits)

Question

:[count]tab {cmd}

Executes a command and places the opened buffer (if any) in a new tab instead.

:tab b part-of-filename

Is a fast way to open a buffer in a new tab.

Is there an equivalent that does the same with a split or vertical split?

Answer 1

:split +{cmd} is supported to run a command on splitting.

However, this can't be used to select a buffer, for that do :sbuffer (:sb) and :vert sb