ATAPI is a software/command syntax protocol that uses IDE as the physical transport medium. Technically it wasn't even developed by the same industry consortium that maintained the IDE/ATA standards until the two merged with *ATA/ATAPI-4*. With the appropriate driver you can speak to ATAPI devices over any controller adhering to the ATA-2 standard or better. (And it *may* work over some vendor-specific "EIDE" variations that were coming out prior to the ATA-2 standard being ratified.) And that said... ATA-3 and ATA-2 are essentially the same thing. ATA-3 was a minor revision that added SMART as a "standard feature" and changed some implementation requirements to solve some reliability issues with faster transfer modes. It didn't add any new modes so a controller designed for ATA-2 could be trivially made to behave as an ATA-3 controller with little more than a BIOS tweak or driver change. 33MB/s UDMA modes are ATA-4.
The Lombard uses essentially the same drive controller as the Beige G3. ATA-3 wasn't ratified until 1997 so that controller was undoubtedly designed under the ATA-2 specifications, which might explain why whatever specs you're looking at call it that. (It's very possible that it doesn't strictly meet some "letter of the law" ATA-3 requirement with regards to physical implementation.) But being "ATA-2" doesn't prevent it from doing "ATA-3" things.