Adding more assets to a new PMAX campaign

I've started this feed only PMAX campaign for some of our top selling skus for one brand we sell on October 15. We are transitioning for standard shopping ads, therefore we have quite a bit of conversion data in the account.

It has still not exited learning phase but I see that the results are good so far and we have more products from different brands to add that have good conversion data from previous shopping campaigns to add in this campaign as different asset groups. Should I wait before it exits learning phase to add new asset groups and increase the budget?

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