I think we went through this a few times in the past, both with "Bluejays" and "From Mighty Oaks". Both had quad mixes created, but they were not encoded LPs, despite years of debate.
The Bluejays, of course, was release on Q4 (twice) and Q8, and if you listen to the interview promotional LP for that album you can hear Justin Hayward talk about listening to the quad playback (I seem to recall posting that bit of the interview here a few years ago) of the mix in the studio. And "From Mighty Oaks", which actually was listed in Schwann and a few other places as being a QS disc was in fact not a QS disc. The original quad mix was released finally in 2010 or so when there was a limited edition of the disc created in England and the quad mix was included on a DVD-V.
https://www.quadraphonicquad.com/forums/showthread.php?13515