As people mentioned here, most pop artists are solo now (even if they play with a band, like Billie Eilish with her brother Finneas). But there are some exceptions. From the ones I love:

• Magdalena Bay — amazing synthpop duo, heavy influenced by progressive rock.
• Chairlift — also a duo, were active in 10s, and unfortunately broke up, and Caroline Polachek started solo career.
• Florence + The Machine — do I even need to introduce them? Fantastic folk leaning pop legends.
• Femtanyl — hyperpop duo creating wildest music.
• King Gizzard & The Lizard Wizard — very versatile Australian collective making music in many genres from psychedelic/progressive rock to trance and rap. They have lots of albums, but sounds on Microtonal Flying Banana, K.G., L.W., and Butterfly 3000 are pop I'd say.
• Turnstile — amazing hardcore/emo band with fire live shows. Pop in the wide sense.
• Gorillaz — yep, they are still alive and well. Making music in many genres, collabing with wide range artists. They dropped album The Mountain this year, with heavy influence of Indian and Arabic music.
• Geese — psychedelic rock band with funny catchy tunes.