Worn tie rods are more likely behind your horizontal freeplay rather than wheel bearings. Doing them as part of a wheel alignment is ideal. The shop will routinely check for worn joints anyway. Your V90 has an inner and outer tie rod. The outer will tend to go first. You need to verify whether yours is TRW (most common) or CAM steering. You could try to identify which one(s) are gone, but probably best to replace everything as part of a front end suspension overhaul that won't cause problems again anytime soon. When doing the tie rods it's a golden opportunity to replace the steering rack boots before they split as when they go you need to take everything apart again and be very careful to preserve wheel alignment. The shop will be able to order the parts, but you should make sure they're ordering top quality aftermarket or Genuine Volvo as some shops might go for what's most readily available or cheap. Or you could get quality parts for them ahead of time and save yourself a few dollars. Some shops prefer not to install customer parts due to warranty issues, so maybe check with your shop before ordering, maybe also get them to quote on a couple of the better brands.

FCPEuro sells a TRW tie rod kit with their lifetime guarantee and excellent customer service reputation.
https://www.fcpeuro.com/products/volvo-tie-rod-kit-inner-outer-960-s90-v90-lemforder-kit

RockAuto has quite a bit cheaper prices, but you need to be careful of brand reputation. Vaico seems to be popular for quality.

No real need to start a new thread unless you run into a mystery that's not related to the subject. If you want to address a specific issue you can change the subject like I did here or start a new thread.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now