Put employer policy first. Use approved systems only. Hide lock-screen...

https://star-wiki.win/index.php/How_do_I_organise_my_phone_so_I_don%27t_mix_work_and_entertainment%3F

Put employer policy first. Use approved systems only. Hide lock-screen previews. Set on-call alerts to match your rota, then mute work notifications off duty when policy allows. Before sharing, check the account, recipient and channel