What's the connection?

When I revealed to my partner that I was a DL, they had asked me if I was also into wearing panties too since it was also common among those who wore diapers. (They have prior knowledge of kinks in general, not specifically AB/DL).

I said no at the time and didn't think much of it, but after consideration I thought about it more and I think I'd be into trying it. Looking into it more the usual CD/TV stuff came up but I couldn't find any relation to AB/DL.

What makes this appealing to those who wear diapers?

Control by means of "submission"? Baby gets what baby wants. Same with sissies.

I actually like wearing women's​panties over my pull ups during the day because they are shaped​ better to hold everything in place better.

I have seen this mentioned from time to time but I don't think it's common among ABDLs. If it sounds fun, give it a try. I don't care for any regular underwear over my diaper. Onesies or nothing!

I would much rather be wearing (plastic) diaper covers over diapers with a panty like motif - frilly lace edging and rows of ruffled lace trim on the bum - even all around.
Object making discrete noisy moves while giving perhaps a tantalizing glimpse of this profound undergear !
Really unless wearing grannie panties you can't duplicate this and don't have the overall protection of the cover.

Image - binkies_n_bows ebay seller:

I don't think it's a matter of submission, at least not for me. For me, I also tend to wear girls' clothes, sometimes just because it's something I want to wear, other times because it's part of an AB/DL thing.

Also, babylock1, what's the link for those?

Oh my lions tigers and bears - hope you are wearing that protection (diapers) you could get awfully excited and lose it !
Ebay Search LINK:

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=adult+baby+diaper+covers&_sacat=0

Adult Baby Sissy Littles BIRTHDAY CAKE Diaper Cover Binkies_n_Bows Dress Up
Ebay Item number: 162910821774

And another seller: leannes_pretty_dresses
PINK RUFFLE BUTT Rhumba Panties Adult Baby DIAPER COVER Sissy Dress up LEANNE
Ebay Item number: 392026906188

Look around the sellers website (store) and check out similar items from even more sellers.
Questionable less expensive stuff can be had from China !

Thanks babylock1!