That's ok. I haven't used weaker wall-adapters than required at output yet. I'm always using exact ratings, like a 5V wall-adapter for a 5V circuit, or a stronger wall-adapter and using voltage regulators to bring it down.
I ordered 10 and I'll see what the railure rate is. Some comments say they suck, but you never know how they treated the units.
Found the Alice design is on Amazon (same IC), but they're advertising it as boost only:
https://www.amazon.com/Eiechip-Volta.../dp/B07RNBJK5F
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