I do think that the table implementation is novel, and may in very specific situations be useful. For instance, if you can’t pay for something like Bitwarden Premium, which syncs TOTP codes, but requires payment because they use compuational power to generate. However, TOTP seems to me inherently superior in every other situation.
Of course, the obvious answer would probably be that nobody’s got around to adding support for it, but if the answer is different, I’d love to know. Thanks.