@Bobbobbobbing sorry to hear that! Loads of enrichment though can tire them out - so roll kibble in a tea towel and they have to unroll it. You can freeze them too!
Any recycling - cardboard egg boxes, boxes, maxing packaging, toilet and kitchen roll tubes / use to his kibble and let them shred!
Lickimats/kongs frozen.
Muffin tin with treats in and balls cut in half on top…
Hide and seek with toys/treats?
Look up Canine Enrichment on fb loads of diy ideas on there for this sort of thing! although it does sort of assume one of you is well enough to make/create things!