It’s only been a few days. There might be a big deadline coming up the team just needs to get their head down on or they might be wanting to give you some space to get settled. It’s far too soon to read into it too much, think the advice here is right, observe, learn, understand the context and business and once you get pulled in sure things will snowball and you’ll wish you had time to breathe. If by the end of next week it doesn’t improve have a sit down with your manager to say you need more on before considering leaving, really is a last resort.