You are working on a module MyCompany_MyModule which adds a select attribute with a few options using the \Magento\Eav\Setup\EavSetup: :addAttribute() method in data in data install script.
There is no uninstall script. While debugging, you have uninstalled the module with the command:
bin magento module:uninstall MyCompany_MyModule
Then you reinstalled the module. What will be the effect on the attribute?
Jacki
23 hours ago