The rapid spread of soft and electric-powered micro personal mobility vehicles (S&ePMVs) such as e-bikes and e-scooters is redefining urban mobility debates. Their integration in the urban context remains ambiguous and a topic of growing interest. Several studies and reviews focused on different topic-related, e.g., micro-mobility and built environment relationship, safe bikeway infrastructure design, or e-bike and e-scooter level-of-service. However, few studies investigated a unifying approach to planning, infrastructural, and social issues related to their integration. Therefore, this paper aims to identify the role of S&ePMVs within transport and urban planning, and how they are integrated into planning, infrastructural, and social issues, as well as opportunities and challenges therein. The synthetic and systematic literature review is based on PRISMA methodology and examined 49 articles from 2013 to 2025. As a result, three analytical domains are examined: (i) social challenges, (ii) planning strategies, and (iii) safety concerns and emerging conflicts. Results revealed persistent tensions, e.g., disparities related to gender and age, uneven infrastructural continuity and street space reallocation, and heightened safety risks stemming from poor design. Therefore, while S&ePMVs promise to favour sustainable mobility and reduce car dependency, their diffusion also risks deepening inequalities and generating new conflicts. Finally, results emphasised policy implications, emphasising more flexible and forward-thinking strategies to integrate S&ePMVs. This study provides urban planners and policymakers with evidence-based guidelines for integrating S&ePMVs into transport systems, balancing sustainability goals with equity and safety concerns.