Yes they can, take a look at this https://www.wowhead.com/guide/leveling/dragonflight
I would start at 10 and do the expansions you outlined. If 49 is your choice then at that point I’d freeze my experience between 49 and 59. Take a look a this Blizzard topic https://us.battle.net/support/en/article/15422 doing that will maximize your chance to do all the expansions using Chromie time. To resume your experience, just visit that NPC and pay to undo it.
I wish you all the best.