I exported my data with these tools (and tried out alternatives too):

Tried out instances were piped.lunar.icu and piped.yt and lunar was able to create empty playlists which were named correctly atleast or just refreshed the page with nothing happening but it has detected 0 subscriptions. yt on the other hand didn’t respond to either of these import requests, but it correctly detected my subscriptions, just didn’t import them.

Am I doing something wrong, on an instance where this feature is incomplete, or are these features currently in development?

EDIT: kavin.rocks can successfully import the subscribers, but not the playlists.