Dedoimedo published a review of the upgrade process from Kubuntu 18.04 to 20.04 on an Asus Vivobook.

Asus Vivobook - Kubuntu Bionic to Focal upgrade

Review of the upgrade process from Kubuntu 18.04 Bionic Beaver to Kubuntu 20.04 Focal Fossa on my dual-boot Asus Vivobook, covering command-line upgrade process and associated niggles, first boot and splash screen changes, login screen flickers, look and feel, application compatibility, Gtk application integration, Samba connectivity and playback, performance, responsiveness, various desktop papercuts, and more

Asus Vivobook - Kubuntu Bionic to Focal upgrade