In Digital Foundry's tech review of Donkey Kong Bananza, it's noted that the latest Switch 2 exclusive title doesn't support DLSS, despite it being one of the console's major features.

Nintendo’s Switch 2 has been out in the wild for over a month, and despite the launch feeling decidedly muted, there’s no denying the new console’s massive early success.

Donkey Kong Bananza has some small performance issues, and Nintendo is aware

Donkey Kong Bananza’s street date has been broken, and significant game spoilers are beginning to circulate online. Multiple social media users posted images showing they’d obtained early copies of the Switch 2 game over the weekend, and screenshots of unannounced game content are already being shared.