Perhaps I'm projecting a little, but: please don't feel like you're stuck there. It's an illusion more often than not.
Of all the hills I am willing to die on, getting another phone isn’t one. Especially if they provide a credit for your cell phone.
https://www.teamblind.com/post/Amazon-Cell-Phone-Reimburseme...
I personally just bought the cheapest $60-80 Android phone from a random Amazon seller.
I don't think the German approach is always the best.
So I call private contacts from private SIM, business contacts from business SIM. I have Apps separated into business and private and the respective profiles are in place. Business partition (so to speak) is managed by employer. Private partition is MDMed by myself.
So I have both worlds - in one device. If my employer decides to delete the business partition. I have exactly no problem with that (we tested it and it worked like a charm - private data wasn't affected. We also tested access to private data being nil).
It falls under the category of providing your own resources to do your job, and that territory enters socioeconomic discrimination territory real quick.
But for engineers and other office workers at tech companies?
As a practical matter, people have to buy lots of things to do professional jobs that they wouldn't need to buy without those jobs. In this day and age, if you want a second phone, buying a few year old phone is cheap as is adding another phone to your existing cellular account in most cases.
And, seriously, complaining about having to spend a few bucks for something you need at work is equivalent to circumstances around Indian treaties in the US?
If you, as an employee, don't want to remove TikTok I believe you will have that right, it's just that you won't be able to access company emails from that device.
Now, whether or not that leads to a company phone or you having to look for another job, depends on the individual and how important that individual is to the company.