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They've got both 2-year, home-and-home opponents and permanent rivals going beyond that (with some exceptions).
Teams in bold are annual rivals, regular font = home-and-home just for '24 and '25:
Illinois: Northwestern, Purdue, Ohio St
Indiana:  Maryland, MSU, Purdue
Iowa:  Minnesota, Nebraska, Wisconsin
Maryland:  Indiana, Michigan, Rutgers
Michigan:  Maryland, MSU, Ohio St
MSU:  Indiana, Michigan, Penn St
Minnesota:  Iowa, Nebraska, Wisconsin
Nebraska:  Iowa, Minnesota, UCLA
N'Western: Illinois, Ohio St, Purdue
Ohio St:  Illinois, Michigan, N'Western
Penn St:  MSU, Rutgers, USC
Purdue:  Illinois, Indiana, N'Western
Rutgers:  Maryland, Penn St, UCLA
UCLA:  Nebraska, Rutgers, USC
USC:  Penn St, UCLA, Wisconsin
Wisconsin:  Iowa, Minnesota, USC
................................................. .......................
Yes, Iowa's 3 opponents are ongoing.
No, Penn St doesn't have any ongoing opponents at this time.
This is called a "Flex Protect Plus" scheduling model.  It's a 2-year stop-gap, like the SEC's 1-year idea of kicking the can down the road.

Iowa is all set

Could be a great year or a very bad year. 4-5 helmets, depending how UNL is viewed.

USC:  Penn St, UCLA, Wisconsin

For 2024 USC is scheduled for

Vs LSU (Las Vegas)
Vs Notre Dame
Vs Michigan
Vs Wisconsin
@ Penn State
@ UCLA

That's quite a step up from their usual draw of @Cal, Vs Colorado, @ASU, Vs Oregon...

Good. That's what the LA Schools wanted and hopefully the Big Ten doesn't do them any favors. 

Let 'em both whine about the denser schedule. Whine about the travel distances. Whine about the colder weather in November. Whine about Michigan and Ohio State having louder voices in the boardroom. Whine about how it isn't worth the TV money. And then F 'em on the next TV deal with an unequal share.

Sorry Minni, but I'd rather see Wisconsin play Iowa, Nebraska and USC or UCLA every year. 

UGA 2030 OOC slate:

Aug. 31: vs. Clemson
Sept. 7: vs. North Carolina A&T
Sept. 14: vs. Ohio State
Nov. 30: vs. Georgia Tech

2027:


Sept. 4: at Florida State
Sept. 18: vs. Louisville
Nov. 27: at Georgia Tech

2026:


Sept. 5: vs. UCLA
Sept. 12: vs. Western Kentucky
Sept. 19: at Louisville
Nov. 28: vs. Georgia Tech

I'd hate to have to drop any of those P5 matchups because of some 9 game conference schedule (aside from Tech).

1. The B1G Story
Let’s play another round of protect Ohio State at all cost, shall we?

Since the Big Ten can’t protect the Buckeyes from Michigan anymore, the next best step is insulating them from nearly every other potential disaster — and a straight shot to the 2024 Playoff.

That’s the takeaway from last week’s Big Ten schedule release, which was only marginally less ridiculous than the SEC punting on a 9-game schedule because — and I still can’t believe this — they wanted to know from the Playoff executive committee if there would be special consideration for schools with 2 or 3 SEC losses.

I mean, how could we move forward in life if a 3-loss SEC team wasn’t selected to the new 12-team Playoff?

But enough of that nonsense, let’s turn our attention to Ohio State, which is about as SEC as SEC gets. If there’s 1 team in the Big Ten that would fit right in with the rival league down south, it’s Ohio State.


https://saturdaytradition.com/big-ten-football/the-b1g-10-new-schedule-format-for-2024-25-protects-ohio-state-at-the-expense-of-tv-viewers/?fbclid=IwAR0_Geav_I0tWzWeqiYEi23XkpyNjv55nq48Lz3bXpRFZyACb5gLGg7OpYA

But at the very least, the league could eliminate the idea of favoritism by having a 3-6 model that sets 3 permanent opponents and allows all 6 elite television properties to play each other permanently.

Again, it’s not that difficult.

Ohio State: Michigan, Penn State, UCLA
Michigan: Ohio State, USC, Wisconsin
Penn State: Wisconsin, Ohio State, UCLA
Wisconsin: Penn State, Michigan, USC
USC: UCLA, Michigan, Wisconsin
UCLA: USC, Ohio State, Penn State