Even in their football and Olympic teams, they include a lot of expats. But the difference is that the FIFA and IOC rules force them to provide citizenship to these players first, before including them in the team. A perfect example is that of Qatar team in the 2022 FIFA World Cup. Around 40% of the players were expats (with Qatari citizenship, like Ró-Ró from Cabo Verde, Mohammed Muntari from Ghana and Almoez Ali from Sudan) and some 60% were natives. ICC doesn't have any such restrictions, and therefore they can include whomever they want.
Qatar atleast has 60% native players and remaining 40% are expats but still have the nationality. That's not the case with cricket, if you see teams of UAE then there is no local player as all are either from Pakistan or India. The downside of this approach is that nations that are passionate about cricket are suffering alot like Nepal. ICC has no objection on such team of expats which mean they will continue to have team like this.
ICC haven't strict the rule to have native players or to prove the identity as countries involvement into cricket is low. Over the years when more teams gets in, ICC may change the rule or it is upto the country to restrict only the natives to play on the national team.
