is there a way to trigger UE scripts with records updated via bulk processing?

Yes, UE's trigger on mass updates, csv and scheduled trigger types provided the UE hasn't excluded them

Note that if you create a Saved Mass Update (not a scripted one) it WILL run UE scripts even if they have “Custom Mass Update” unselected under context.

depends on the bulk processing, some trigger, some dont

Saw the issue, but now have another one. So the cash sale is created trough the bulk processing Sales Order -> Invoice sales orders, now this one triggers the Cash Sale UE, on this script had a condition

// redirect.toSuitelet only works on UI, not when doing bulk transactions
if (runtime.executionContext === 'USERINTERFACE') {
  callSuitelet({ id, type, dataToSend });
}
if (runtime.executionContext === 'USEREVENT') {
   editOrderStatus({ id, type, dataToSend });
}

Apparently when i did my tests, when bulk processing the context was USERINTERFACE but now the context is USEREVENT. Now i just commented that out and let the callSuitelet function but on my tests for some reason the callSuitelet is not triggering the suitelet, on the logs of the suitelet I have a function right at the beginning and this is not being printed

const callSuitelet = ({ id, type, dataToSend }) => {
        const fn = 'callSuitelet';
      log.debug({ title: `${fn}`, details: 'start...' });
        try {
            // call to suitelet to trigger UE transaction trigger, UE cant chain other UEs
            const params = {
                id,
                type,
                externalid: dataToSend.externalId,
            };
          log.debug({ title: params, details: params });
            redirect.toSuitelet({
                scriptId: 'customscript_bit_su_he',
                deploymentId: 'customdeploy_bit_su_he',
                parameters: params,
            });
        } catch (error) {
            log.error({ title: `Error: ${fn}`, details: error });
        }
    };

whoever wrote the code originally left the helpful explanation

I mean I wrote the code hahaha, thats why is weird that before, the context was another one that the one that im getting today, thats the reason I put that comment, I knew this was gonna be helpful for my future self 😅

you shouldnt be getting the user event context type unless you are using the invoice sales order page