I've seen mail from my work Google Workspace that I sent to my own personal Gmail get flagged as spam. It's me sending to me. Google to Google. Logged into both account on the same computer.
If anything I'm nervous to recommend Google because they flag too many legitimate emails as spam. After years of not checking, I'm checking spam again.
> mail from my work Google Workspace that I sent to my own personal Gmail
Does your company do outbound marketing/sales?
I've seen multiple companies spin up outbound email marketing campaigns where someone compiles a list of 5000 email addresses based on certain demographics, and then send automated emails (that look not automated) over the course of a month, rinse, repeat. Google Workspace will let you do this, but if you're too aggressive with email volume it can kill the reputation, and therefore deliverability of any email from that domain.
(Which is why most companies send outbound sales emails from a domain other than their primary domain to separate out the sending domain reputation)
If anything I'm nervous to recommend Google because they flag too many legitimate emails as spam. After years of not checking, I'm checking spam again.