I would stop the taxable investing in your Robinhood until you had your retirement contributions up to at least 15% of income. Your are technically behind on retirement by a good amount (1 years salary by the age of 30), so aim for more while you can seemingly afford it. The value of compounding over time is huge for you.

You can save for a future wedding when there is someone in the picture and your are engaged. I wouldn't keep saving and earmark it for a wedding when one isn't likely in the near term. Until then it makes a great downpayment on a home if you want to be a homeowner. That said this sub doesn't recommend you invest money you plan to need in the next 5 years (short term).

Where is the rest of your money going? I calculated you should see about $3852 a month assuming 2 biweekly checks after 401k contributions. After rent that's nearly $3k that's unaccounted for.