I’d go for a larger size once a day SPF like ultrasun, and a small spray that can be used on face to keep in my bag (I am very particular about spf too having lost a family member to skin cancer)
I’d ditch shower gel and take soap - lemon or coconut, to help as mosquito deterrent. I prefer bar soap - gives more of a squeaky clean all over, essential for washing off the sun cream.
jungle formula roll on (not spray), again for mosquitos.
I’d start taking antihistamines a few weeks before you go, to minimise reactions to bites (can you tell this is a focus for my travels)
I’d skip retinol for a few weeks if out in hot sun all the time, assuming you’re not from a similar climate
compeed stick is brilliant for preventing blisters, especially with sandals, just apply it to any likely blister areas. (But take the plasters too).
a really good lip mask for overnight - I like this one https://www.boots.com/laneige-lip-sleeping-mask-20g-10348503
Facial skin care - moisturising layers matters to me in hot weather, I’d add in a hydrating mist.
I take a lot of toiletries on holiday, but I do stick to travel size for face stuff (decanting from bigger bottles).
hair cap for the shower if you don’t want to wash or rinse it twice a day.
i wouldn’t layer after sun and body moisturiser, i would just stick with the body moisturiser. I might take a travel size bottle of aloe Vera in case of burning though.
Tweezers.
A decent hand cream.
I wouldn’t bother with foot cream - I normally get a pedicure before the holiday and just use body moisturiser.