So did megane actually regained his memories??

No never

really? i thought he did. xause that was what rikichii wished for waki. that everything waki needs is what the mitoi family will give.

The mangaka left that to the readers. BUT does it matter? I think what matters in the end was that Waki was able to finally realized what Rikiichi's wish for him is. Frankly idc if Magane regained his memory or if he did not, the fact that they are all together and happy is what matters most.