The left side blinkers do not blink?

Hello,

It sounds like you might have a faulty turn signal switch. As your bulbs are good and fuses are working, also your right side turn signal works.
Which means there is a connection issue when you activate the left turn signal.
You could have burnt pins that activates the left signal.
In order to replace the turn signal switch, you will have to remove he steering wheel.

https://www.2carpros.com/articles/turn-signal-switch-replacement

I have attached diagrams for your reference.

Please let me know of any questions.

Thank you.