This is false. Research papers use formal definitions of what ultraprocessed means. The most common classification criteria are called Nova [1].
If you think emulsifiers are unhealthy, conduct a study on emulsifiers. If you think the absence of Nova group 1 foods is unhealthy, study that. I am questioning the value of studying foods with emulsifiers OR no group 1 ingredients OR added sugar OR were extruded OR were moulded OR which have "sophisticated packaging" OR have fruit juice concentrates OR hydrogenated oils OR etc. etc. etc., as if they formed a single scientifically meaningful group.