It is the same where I work, which is a Site of Importance for Nature and UNESCO award-winning for its biodiverse gardens and environmental education. We still have a wide range of insects, but like... a much smaller volume compared to usual. I grew up going to the same garden and as a child is was amazing how buzzing it was with life and how full of insects it was, the past few years there has still been some but not the same, and this year very very spare.
There is the June gap for butterflies inbetween generations so hopefully in July we see more, but far less bees, wasps, hoverflies, beetles, etc. We have a big pollinator garden, lots of habitat and water for them but clearly the extreme weather of climate change, pollution of our waters and land and pesticides are having their disasterous effect.
Cilmate change now particularly causes insects to hibernate late and emerge early when there is not enough food around, so if everyone can focus on growing flowering plants in their garden which flower all year round (as in, different flowering plant species for all different times of year), that can really help, along with replacing your lawn with wildflowers. Grow native bushes and trees which insects specifically rely on like disease-resistant elm, holly, etc.
See some specific habitats and plants here. Don't cut down your dead plants and stems in autumn, wait until spring and provide piles of logs and twigs for hibernating habitat and food for grubs. Make compost in your back garden from your food and garden waste - wildlife loves compost heaps and it massively improves biodiversity and worms in the soil. Make bug hotels, install a pond/water source with shallow water access, and encourage your neighbours to garden the same to widen the habitat. If you're in an urban area there's less likely to be pesticide floating about, so even more important we give insects high quality habitat as a sanctuary from our dying countryside.