I dont sell in Clothing, but from what I've seen here, it takes time to get approved and is not automatic.
There's no instant gratification on Amazon.
Take the waiting time to read all of Seller Help and work on your photos to make sure they meet Amazon standards. Apparel is the pickiest department of all on pictures.
The clothing team probably does not work on weekends. If you sent your application on Thurs, it's only been 1 business day.
Will you be selling clothing to U.S. customers from overseas? If so, you need to be familiar with the U.S. clothing laws. There are many specific rules on what kind of material can be used on each type of clothing, specific requirements for disclosures on the inside tag, etc.
Now would also be a good time to download the entire Clothing Style Guide and read over it. It will tell you how to create clothing listings. There is a specific title format, requirements on what info needs to be included in the description, etc.