I'm still on Sonoma (14). And it pisses me off that there's no easy way to upgrade to Sequoia (15). I really don't want to touch Tahoe at all.
Admittedly it would be "easier" if Apple gave you the choice of which version to upgrade to in macOS, but that's generally not how software is provided.
Open the Mac App Store and search for Sequoia.
edit: worked after second attempt (via macappstores://apps.apple.com/app/macos-sequoia/id6596773750?mt=12 )