Migration Queensland has added the following note under 491 SBO Pathway
Applicants for the 491 Small Business Owner (SBO) pathway with Migration Queensland have signed a declaration under (item 7(b) to: operate a business and reside in Queensland for at least three years from visa grant. Should an applicant choose to sell their SBO business prior to this time, Migration Queensland has the option to withdraw the nomination of the 491 visa to allow the applicant to explore other visa options.
Applicants need to be aware of this condition prior to committing to this visa pathway.
Source: https://migration.qld.gov.au/program-updates/491-sbo-(small-business-owners)-pathway