Ultimate Collection always launched as Mansions and Gardens (Or maybe Fun with Pets). Back in the day, Sims 2 would launch showing a splash screen for whatever the latest pack was that you had installed. M&G was the last pack to be released and EA never made a new splash screen just for UC. I installed a custom one myself that said Ultimate Collection.
I would suggest googling how to get Sims 2 Ultimate Collection working on modern machines to find what you need. I'm sorry I can't remember all the details on how to fix everything myself, I'm pretty sure I just googled it each time I got a new computer. I know you will need the 4gb patch and you will need to edit the graphics rules. There may be other tweaks you need. Unfortunately it simply doesn't run on modern machines without help.
Edit: It just occurred to me that you said you got it before Sims 3. If you did, then it's not Ultimate Collection. UC was released in 2014, 5 years after Sims 3. Or you are remembering wrong when you got it. This is The Sims 2 Ultimate Collection in the EA app that you are asking about?