This is listed as a VDASH supported application - fitting ABL xenon to a halogen car and also the reverse (fitting halogens into a ABL xenon).
It's not straight forward as it does require extra wiring/sensors and ideally I would say you'd need to change over the headlamp control fascia next to your knee to remove the manual headlight adjustment wheel. Some smart MOT person might recognise that a "genuine" ABL xenon car would not have this as they're automatically adjusting.
https://d5t5.com/article/volvo-change-configuration
I'd love to do this conversion to be honest. I love my V70 and I've loads of extra kit I love...but sadly not the xenons - The one bit of "luxury" that I consider a fundamental safety feature!