In the early nineties, magazines carried adverts for a number of TUI libraries, many of them supporting multiple compilers and/or platforms. Examples include Vermont Views, any of the libraries in the “C Screens” section of the Programmer’s Paradise catalog, etc. However none of these captured a large market share, as far as I’m aware, with the possible exception of Turbo Power’s library and C-scape (which supports text and graphics, and is cross-platform).
There were some cross-platform TUIs provided by programming environments which were cross-platform and widely used, at least for bespoke software used in professional settings: the various form generation tools used by databases such as Fox Pro, dBase... Some of these were also available as TUIs or GUIs depending on the platform (e.g. Fox Pro for DOS and Macintosh).
While it doesn’t qualify as either multi-compiler or cross-platform, Visual Basic for DOS included a distinctive TUI library which was briefly popular.