Dress shirt with studs (not buttons). Studs should be plain black and match the cufflinks.

+1 for no wing collars, clip ons or cummerbunds, agnostic on waistcoats or braces.

Studs and manly chest hair don’t mix well.

My opinion of what is correct is:
Peaked lapel jacket – most formal
Shawl lapel
Notched lapel – least formal (not really a dinner jacket per se)

Black, silk self tie bow tie

u-shaped waistcoat
or cummerbund (less formal)

Braces are for white tie.

Normal collar white shirt with pique marcella front and cuffs fastened with matching studs and cuff links
or pleated front if you’re an effeminate Spaniard or yank.

Cuffs should not be visible, nor should the jacket be removed really.

Black trousers with single stripe down the leg

black silk socks and patent shoes

hankerchief or silk scarf optional.