Hey Tad! Thank you for the input on #3. That was a good finding. We never have to mess with this in the past because it was already turned on by default. I hope the JoomShaper team see this and make the change to make it on as default.
All in all, for anyone curious to whether or not this template work in J4. The answer is yes. I just ran a test and spin a new J4 website for testing. I was able to install both ShaperHelix template and latest SP Page Builder along with article and K2 integration without any issue. Everything went smoothly. Now, if you ask about update, the answer so far is NO. I have 3 sites went down after updating to J4. ShaperHelix and SP Page Builder aren't the only component crashing the site. All the Regular Labs stuff are also does the same thing. Since I cannot use Sourcerer just yet in J4, I guess J4 updates are not in my agenda anytime soon.
To be completely hontest, I DO NOT LIKE the new UI in J4. I don't know why they shifting to look more like WORSTpress. There's a reason why we all LOVE Joomla because it is NOT the same as Worstpress and has its own personality. We used to be able to go to any part of the admin area from the top bar now we have to go click on the left bar, get to the main system menu before we can install extension, do general config, etc. But, it is how it is I guess. I hope the Joomla team see this and bring back the good ol Joomla that was REALLY GOOD.