Astute points above about US Steeple & 1500m.
Watch last year's USATF Champs 1500 women's final . . . Hiltz & Johnson appear to have the fastest last 100m of anyone in the race . . . but they were too far back before coming on at the end to make the team for Doha . . . outside of Shelby who is the strongest and fastest, I don't see how anyone can predict who will be #2 and #3 next year at the Trials . . . especially now with all these incredible time trial results we have been seeing this summer . . . Jenny could have a solid race in the finals next year, do everything tactically right, and not even make top-3.
But one point about the US steeple . . . Frerichs 9:00 & Coburn 9:02 are #7 & #8 on the all-time world list and Quigley 9:10 is #23, just ahead of Jenny 9:12 at #24.
https://www.worldathletics.org/records/all-time-toplists/middlelong/3000-metres-steeplechase/outdoor/women/senior
However, as was correctly stated above, AllieO & Mel Lawrence are #4 and #5 currently in the US and both their prs is 9:29. Jenny & top-3 would have plenty of room for error -- tripping over a hurdle, bad tactics, etc -- and still get the 4th alternate spot. And, as mentioned above, injuries do happen in the Steeple.
Point is, if you make the US team in the women's Steeple, you are already one the current world's best and have quite a decent chance to medal at the Olympics or Worlds.
Jenny could certainly have an excellent chance to make the US team in the 5k or the 10k (has not been mentioned yet but Jenny pull a Hassan at the Trials, just cruise along, cover every move, then easily outkick everyone at the end) but what are her chances of gold/silver/bronze at Olys/Worlds in either of these longer events? I would think virtually 0%.
So, I believe the point the OP is making is this: Jenny's best chance of medaling at the Olympics -- or Worlds in Eugene in 2022 -- appears to be in the Steeple.
Now, whether that is what's on her mind or whether she's still all-in on the 1500m, we don't know. Her surprise 14:58 indoor 5k this past February may be a hint . . . or it just may be her early season decision to run an overdistance conditioning race.