I am not sure if you have looked at the Brewers prospects but most of them are OF's and two are very close to contributing for the Brewers in Wiemer and Mitchell who are both in AA this year and should be in AAA at some point this year. Depending on the prospect AAA is usually just a holding place for players until the super 2 status can be avoided.
Basically at some point next year Wiemer and Mitchell should be playing for the Brewers if everything goes right this year for them. Assuming no injuries or them taking a step back in their development Mitchell and Wiemer should be playing for the Brewers in 2023 at some point. I wouldn't be surprised to see both in the major league camp in spring training next year and possibly one making the team out of spring training.
If the Brewers do trade Woodruff after this season it will be for prospects and not MLB players. The most recent example of a trade like this was the Sale trade. So something like this from the Tigers:
Brewers get:
Greene, Jobe, Dingler and Kreidler
Tigers get:
Woodruff
Another possible prospect trade would be with the Rangers.
Brewers get:
Leiter, Jung, Smith, Acuna and Zavala
Rangers get:
Woodruff.