I would not change your volumes, especially all because all sellers are being treated equally with the new ASIN restrictions, even though I know with a ‘new ASIN’ we need to ‘build-up’ volumes.
While some of your established competitors might be able to sell currently through FBA you do not know their inbound shipping restrictions which may mean they need to divert sales through to their FBM listing.
The risk of being out of stock or running out of stock is too high at the moment with international shipping delays and FBA inventory clearance delays, all caused by COVID. The reality is, being out of stock will destroy your ranking and all the good work you do a launch. On the flip side, you ‘may’ hold a little more stock than you will turn over in 2-3 months, but it’s a calculated decision vs the bigger negative.