Riivolution mods should include an .xml file in the "riivolution" folder, open the .xml file a text editor, if you see any text that mentions "memory offset", then you won't be able to inject the mods into the ISO. From memory, only mods that...
As Switch games releases will eventually slow to a trickle in the coming years (or months?), the need to update to the newest firmware will also become irrelevant, probably. We're lucky SciresM's retirement came so late in Switch's life. I...