Need Advice on Two Phones vs. One (work/personal)

I’ve read some (older) threads on this topic, but wouldn’t mind some fresh advice for my situation.

I currently have 2 separate iPhones. One for work and one for personal.

Work Phone:

- AT&T

- separate Apple ID

- In O365

Personal Phone:

- Verizon

- separate Apple ID

- using Apple, GMail, Google Calendar

I predominantly use both phones on and off through the week. I have the discipline not to constantly react to/answer work phone on nights and weekends. On holidays, I keep my personal phone on me, leave the work phone at the hotel. However, I would like to be able to have work people reach me in case of emergency during nights/weekends/holidays.

Future thoughts:

- I don’t mind carrying two phones, but wouldn’t mind combining to an iPhone Pro Max

- Want to be able to be reached in case of emergency (set up Focus mode with Notifications going to lock screen, for example)

Seeking Advice:

- Your thoughts (especially from personal experience); keep two or combine?

- I presume, I’d be able to keep the same two phone numbers when I move to an eSIM?

- Can I keep work/personal contacts fire-walled between the two phone numbers / Apple ID accounts?

- Anything else I missed or should consider?