I second 1/2 Prince.

Heart no Kuni no Alice - girl gets sent to another world, "Wonderland." No love as far as I can see from what's scanlated.
Tamago no Kimi - girl is too scared to fall in love, but I haven't read it in a while, so I don't really know if it fits.
Zombie-Loan - girl becomes zombie....but is really kinda oblivious.
The Prince's Cactus - don't disregard this because of its weird name, but the female lead is not looking for love, I don't think.
NG Life - now I know the guy IS looking for love, but I'm still going to put it in this list because it's the funniest manga I've ever read, and how many shoujo mangas actually have guys as main chars?
Beast Master - female lead.
Hanatsukihime - in the beginning, it's more like a brother sister relationship than a love relationship. Absolutely recommend this one. The girl is too busy finding her demon to lengthen her life to care much for love.
Hot Blooded Woman - Too much of an idiot to care for love.
Kieli - girl just tagged along guy. Supernatural story. Brilliant, in my opinion. I absolutely recommend this one.
Land of Silver Rain - again, another one of those manhwa where the girl is too much of an idiot for love.
Miriam - In the first few volumes, there's no love at all. Strong female lead.
Tokyo Crazy Paradise - gender bender. Girl was raised as a boy, so has no experience in love, much less know what it is.

Hope this helps 🙂

Would you like to join the Axis Order?

Alisa with Silver Hair

An oldie with a taste for revenge! 😃

you know you want it

Kisshou Tennyo should fit.
Ghost Hunt - I bet you've already read this one, though.
Trinity Blood - The girl is the secondary protagonist (the primary one is male), but she isn't love-obsessed at all (despite the fact that she gets hit on by every guy in the series 🤨 )
Cat and Bird
Dokebi Bride
Akari to Shiro no Shinrei Yawa
Barbara Ikai
Umimachi Diary
Chicago
Mononoke Soushi

Lots of great suggestions here to try. Thanks! Here's mine:

Baby Pop by OGAWA Yayoi (Kimi wa Pet) - High school girl has a sometimes boyfriend, but the focus is on her relationship with her new stepfather after the recent death of her mother.

Oresama Teacher is great, it's almost like a shounen manga in shoujo style (but not that shounen-y either)
I thought Nanaco Robin didn't have much romance either, but she is sort of looking for love..
Hana no Kishi but only three chapters are out so far...
Mix Vegetables - the focus is cooking, it's awesome

Maybe you can try:

Ah! Itoshi no Banchousama - general girl in all boys school but she's definitely a bit oblivious when it comes to romance
Beauty!!
Saiunkoku Monogatari
Mishounen Produce
Migawari Hakushaku no Bouken
S.L.H
Akagami no Shirayukihime
The Bride of the Water God
Suki-tte Ii na yo
Shibariya Komachi
Mobius Doumei - well the heroine is a bit of a fan girl here but the star's not what she's really after
Reimei no Arcana - maybe