Alliance ranked rewards no, you just need to contribute to gifting and reach milestones for the milestone rewards, but you get rank anyways.
As for solo, I would assume not. Rank is determined by your point level and I don't see any in-game messages that make it clear you must reach all milestones to be eligible for rank rewards.
TL:DR - No, you're eligible for both alliance and solo ranked rewards so long as you contribute.
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