You need to state how many you people will you drive.
Alza / Serena / MPV can sit 6 while the rest max 5 and even then I would keep it at 4.

For 2+2 the most comfortable, safe, reliable (IMHO) in your list is CX-30. But the rear seats are soo damn cramped. It is a very nice car for 2 and can on occassion drive 4 or maybe 2 younger kids.

You also don't mention actual budget because your list is from 80k all the way to 150k++ thats a big range.

To make it even more confusing I highly recommend you look at used Corolla Cross Hybrid. Its a no brainer for 4, emergency can sit 5 provided 1 is smaller sized. Ticks all the boxes in terms of reliability, comfort, is relatively new. Has all modern Carplay / AA. Reasonable maintanence, and SUV form factor is not too big not too small.

A 2.5 Camry hybrid is a reasonable choice, but i regularly sit in a 8 year old one and its showing its age everywhere with the creaking suspension mounts and seat cushion being a BIT over compressed.
You probably need to shop around for a fresh specimen.

Alza is a reasonable choice also, but bear in mind if you have safety as top priority avoid P2 / Veloz. Only buy Toyota international models that are scrutinized by western safety standards.
XV- nono
Nissan Serena - ok choice if you regularly ferry 3 rows of passengers. I would choose this over the Alza, as the walk-in height is way nicer than squeeze / crawl in Alza for row 3. Compressor is an easily fixed item in a car, although hassle but won't affect your drive. You want to worry about steering, brakes, engine and transmission firstly. Then suspension and mounts, then only air cond.

Civic - if you are aging please avoid, your knees and back will hurt. Check the seat height AND seat comfort again and again.

I misunderstand you when you say CX-30. A brand new one is 150k++. Used one is like 110k. still a very big range. But ok since you are firm at 80k then ok.
Lets settle the XV - did you test sit? I am pretty sure it is only slightly more spacious than a Corolla cross. Where can sit 4 across the back? At best like Cross, B+ segment. A flat four engine is a major pain to do servicing even on something as "normal" as spark plug change.

C segment that is big enough will sag at the back and you will scrape the bump and road when full loaded. I'm sure you have the experience with Corolla....as I do with a Civic.

TLDR, just get an Alza, wait it out and call it a day. No need to fuss all the used things and potential headache. Are you in such a hurry that 4 months wait time is unbearable? Then just consider hire Grab when you need to drive 6 person.

If you still plan on road trips etc and can stomach a bigger petrol bill then Serena.

Personally I am deciding between either of this too, and tend to go for Alza.

Thanks for correcting me for the Xv spark plug change ease.
I’m interested in knowing how well yours working over the years. I have 2 friends and they are both crying over the reliability and cost of maintenance. From oil consumption and fuel consumption and another one the CVT showing signs of age.