I applied online, got a email to schedule my interview, had a interview with the hiring manager, got told to complete a excel assessment, had a final interview with the hiring manager. Company ghosted me, I followed up multiple times with no reply.

First, you will have a VERY informal video interview. Which will begin with the HR representative saying, "I do not want to waste time, what is your salary expectation?". If moved along you will then be sent an assessment. Lastly, you will then meet with the hiring manager.