In response to recent immigration from religious minority groups, Western countries reevaluate policies on the public display of Islam in urban spaces, with some enforcing restrictive policies and others implementing more inclusive ones, exemplified by France and the UK, respectively. However, the impact of Islam’s public display on immigrant integration remains understudied. This research presents findings from naturalistic field experiments conducted in Paris and London, examining how exposure to public Islam affects urban behavioral engagement among Muslim immigrants. Using an augmented reality mobile app, participants were directed to notice either Islamic symbols in the urban environment (treatment) or non-religious cues (control). Results show that in both cities, Muslim participants exhibited similar approach behaviors and increased urban engagement when exposed to Muslim elements, accompanied by heightened place attachment. We provide further evidence from an original survey conducted among Muslim immigrants in both cities, showing that self-reported exposure to in-group religious symbols in daily life is associated with heightened place attachment. These findings provide evidence that allowing public displays of Islam in public space improves attachment to the city and the urban space, suggesting that inclusive cultural policies allowing minority religious symbols may foster rather than hurt integration.