Kitten with red nose

My 12 month old kitten, Jumper, has developed a red nose over the past 2 weeks. We have had her since 5 months old. She has been sneezing a couple times per day, for about 2 months. She is an indoor only cat. She is eating, drinking, and using the litter box as normal. She’s playful, and shows no signs of lethargy. We have 2 other adult indoor only cats. They mostly get along, but throw the odd swat now and then. Lol I will probably take Jumper to the vet, to be sure, but am curious if anyone else has seen a similar redness on a cats nose? There’s no scabbing or anything, but it used to be black. I will attach a before photo, as well as a current one.

Hello!  One problem with online vetting is that things you would normally see at a glance in person, are sometimes a bit 'is it / isn't it' from a single photo.  One difficulty I'm having with this picture, is where your kitten has a split between the two sides of the upper lip and whether that might reflect a split palette eg along the roof of the mouth.  It is a common "birth defect" as they still seem to call them (I do not condone this language), and if your vet hasn't briefly checked for this, it may be worthwhile to be on the safe side.  Other causes of redness on a cats nose include infectious causes eg ringworm, even cat flu, nasal polyps etc.  So, although some kittens seem to just be sneezers, you were definitely on the right lines with a trip to the vets to rule sone of these dramatic things out.