Please check the M2E Pro versions lifecycle policy before installation/upgrading to be sure your Magento version is compatible with the latest M2E Pro version.
The latest M2E Pro versions are temporarily unavailable on Adobe Commerce Marketplace due to technical aspects. To keep your M2E Pro up-to-date, please use Composer to upgrade the Extension from packagist.org and github.com. Click here for detailed instructions.
Also, you can upgrade the Extension manually by downloading the M2E Pro source code archive.