Safety questions for tire - Michellin in front and Pirelli in the rear as a staggered setup

Safety question- Michellin in front and pirelli in rear as staggered setup

I have a older lexus is250c with a rwd and a staggered fit.
Front: 225/40R18
Rear: 255/40R18

Been trying to get the Pirelli Cinturato Weatheractive. Costco has the rears but not the fronts. I tried everything but doesn’t seem like im gonna get the fronts at costco. One option that was presented to me is that i could get crossclimate 2 in the front and the weatheractive in the rear.
Im ok if it looks weird, more concerned about safety. Would it cause any problems? They are all unidirectional. With the staggered fit i wont be rotating my tires.
Wondering if anyone has any thoughts or experiences?