I would like for the bell to ring so the wrap is more obvious.
Can I do it, or should I open an issue on Github? I imagine this helping a lot of people.
The solution is to adjust the highlight that applies to that message. That depends on what colorscheme you use, but if using a dark background, something like the following works.
:hi WarningMsg ctermfg=15 ctermbg=12 guifg=White guibg=Red gui=NONE
John
See https://github.com/vim/vim/pull/1009 for a patch allowing this, and some vimscript examples in the comments to make it happen.