Nintendo only reports software numbers where there exists a physical version. Not saying they do not report on digital, but only if there is ALSO a physical.
In the Switch1 generation plenty of indies did get a physical, so their digital also counted. But in the Switch2 generation this might not be the case, so on Nintendo terms it would not count.
Example: Hollow knight got a physical for Switch1, so both physical and digital are counted. Silksong as far as I know does not have a physical, so even the digital would not be counted.







