I've noticed in the appendix there are some Gods with granted spells that only appear in the Advanced Players Guide, Blistering Invective is one.
But since the APG isn't coming out for months those spells are essentially non-existent.
Not for the first time. It appears a recurring part of PF2 products is going to be first published books referring to rules elements not yet published that were in co-development at some point.
An earlier example, funnily enough involving Lost Omens Gods & Magic itself, is that in...I believe issue #4 of Age of Ashes, in the backmatter you had some content (alternate domain and associated focus spells) that weren't possible to actually take (and for most of us, still aren't as of the time of writing).