The club is preparing to let him leave this summer, and AC Milan and Porto are interested in signing him. Kiwior may see these clubs as a chance to play regularly, rather than occasionally coming off the bench for Arsenal.
William Saliba, Gabriel Magalhaes, and Cristhian Mosquera are currently ahead of Kiwior in the team's plans, making it unlikely for him to feature much unless there is an injury to one of the three. Everton is also interested in Kiwior, but they already have other options at the position.
According to reports, a move to Porto may not be straightforward, as Arsenal values Kiwior as an important player. The club had previously turned down a bid from Porto in July.