There’s a pair of plug-ins designed for this task: https://forum.audacityteam.org/t/punch-copy-paste/28906/1
These are “Nyquist Plug-ins”. For installation instructions, follow the links on this page: https://manual.audacityteam.org/man/customization.html#plug-ins
(I would have linked to the exact part of the manual, but you’ve not said what operating system you are using).