Covid happily spreads outside. A number of the early pandemic super spreader events were outside like football matches. There was a confirmed transmission in Japan over 80metres from an infected jogger to a group standing quite far away so we know it’s airborne and highly contagious even outside. Outside can be quite acidic due to pollution and this helps the virus survive as do particles in the air so there is a balance between the density indoors verses degradation conditions, it’s a complex picture in the research.
Basic rule, Covid spreads outside since it’s airborne and it can persist in the air for at least an hour. UV light can degrade it faster but it also only takes 7 virons to infect someone and we breath out 1000 with each breath.