Emacs has two built-in ways to create and display tables in buffers.
tabulated-list-mode is the original method circa 2011. As the name implies, it formats a list of entries as a table. tabulated-list-mode is a major mode meant to be derived from. Adding a command that acts on the object under point means invoking tabulated-list-get-entryand defining a mode-map. Many built-in listing functions are based on it: list-processes, list-buffers, list-threads. However, some like proced (proced-format) are not.
In 2022 (v29), vtable was introduced as an alternative to tabulated-list-mode. It’s primary strength is displaying fixed-width tables while using a variable pitch font (hence the prefix ‘v’). A vtable also does not need a dedicated buffer; it can be mixed with other text in a buffer including other vtables. Adding a command that acts on the object under point means adding a function to the :actions arg for make-vtable. One negative is that the column alignment is achieved through the text property :display (space :width (N)) (Specified Space), which means that text-scale-adjust breaks this alignment.
vtable is a more casual and simpler interface, everything can be defined through the main make-vtable DSL. tabulated-list-mode is a more traditional approach with major-modes, keymaps, and buffer-local variables.