Glad you find jsreport interersting.
We keep an eye on Deno, it looks also interesting. :)
I am afraid we cannot simply port jsreport to Deno runtime. jsreport uses many nodejs native modules (networking, file system, crypto....) which will need to be replaced with Deno alternative. This would be really a lot of work.
I think our plan will be to wait a bit what future brings. When Deno will mature to production it will be more clear and likely also some nodejs porting automations will pop up.