Best hub for M4 Mac mini

Specifically which hub will depend upon what ports and other amenities you want/need. All I wanted were a few extra USB A and USB C ports while my wife also wanted a card reader for her Canon camera. As to brand, I strongly recommend OWC products.

Hard to say without any details about what you need and how you plan on using it, the budget you have.

Do you need it to have Ethernet? Do you need a slot for an NVMe? A headphone jack?

What exactly are you looking for? How many ports? USB- C only pr USB-A?

Do you need it to support more than one display?

As an example I use this one:

click here ➡️ UGREEN Revodok Pro USB-C Hub 6 in 1 10Gbps 4K 60Hz HDMI, 100W Power Delivery - Amazon.com

I have tested several types that sit below the Mac and has extra ports. The Raycue is one and contains an NVME drive slot that I use as my TM backup drive. All depends how many extra ports you need. This a Raycue design but less expensive:

https://www.amazon.com/dp/B0DXVFY4VK?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3&th=1

I recommend you call Customer Support at OWC (MacSales.com), tell them what you plan to use it with and your budget requirements and see which of their numerous dock and hubs would best fit your requirements. OWC is considered by many here to be the premier hardware supplier for Macs.