> The UK has a digital ID requirement which is required for you to be employed in the UK.

False

In fact I can't think of a single Government service or legal requirement that requires a smartphone in the UK.

In the past year I have applied for a passport, applied for benefits, opened a bank account, passed through border control, filed a company tax return, closed down a business, helped someone else claim for benefits, made police reports, filed a case with the small claims court, paid my council tax, received an incone tax refund, travelled on public transport extensively, hired a car.

All had alternatives as far as I can recall.

Quite a few were done online just with a computer and optionally a phone number

And based on prior discussions here I have to point out that "require" doesn't mean "ok but the alternative is kind of inconvenient"