Moving countries often means discovering that your assumptions about work were cultural, not universal. Some expats land where evenings and long holidays are sacred and out of hours email is frowned upon; others move into face time cultures where visible hours signal loyalty and leaving before the boss feels transgressive. Both directions require adjustment, and the second is harder.
The underlying drivers are worth reading early: whether output or presence gets measured, how hierarchy shapes when you may leave or decline work, the role of after hours socializing, which in some cultures is where careers are actually built, and the legal framework, since statutory hours and leave differ enormously and are often stronger than newcomers assume.
The workable approach is sequenced. Observe for a few months before pushing against norms, because some are softer than they appear. Use your legal entitlements without apology. Then decide consciously which local patterns you adopt and which you politely resist, because expats who drift into an unhealthy rhythm rarely notice until burnout announces it.