You're right about the bent kickstands of CT70s. It took me a while to decide how they were, when installed at the factory. I went by the observed lean angle, meaning that virtually every footrest assembly I've ever restored has had a session with the "blue wrench". I knew a few people who bought these bikes new, from a dealership and couldn't recall any of them having the exaggerated lean that became so commonplace 40 years later...let alone the ubiquitous 2x4 scrap seen under the kickstands of most ebay listing photos. Eventually, I got my hands on a NOS kickstand...which confirmed my educated guess.
As for the oil flow question, with a normal lean angle the sump is filled sufficiently to feed the pump and oil flows to the head. With my daily rider, the simple test is placing a hand on the oil cooler. (That engine takes .9L, I just pour-in a full quart, to compensate for the added capacity of a small cooler & its lines. I'm also super-picky about the lean angle, thus an adjustable-length kickstand has been in place since 2004.) With more typical bikes, running 49cc-based motors...which includes bone-stock machines...it's not quite so easy. The only way to positively verify top end oil flow requires removal of the lower rocker cover, which is inconvenient and a little messy. I do this with every restoration, right after initial start-up; it's the most painless way to catch oiling problems.
That said, lack of oil flow to the head does manifest as abnormally high head temperature...it's hard to ignore. ~240F, after several minutes at idle, doesn't require an IR thermometer to tell you that something is very wrong. That does takes some time to develop, at idle, and even longer to cause damage. I've seen engines run with non-working oil pumps (someone failed to index the oil pump drive shaft during assembly)...for days(!). Eventually, the cam journals ran dry, resulting in a OHV paperweight. FWIW, the entire lower end, along with the piston/rings & cylinder all survived on splash oiling. So, I imagine that you could pull the lower rocker cover, engine idling, the bike on the kickstand and have a definitive answer (I start with the cover wiped dry, then remove it after running the engine, at idle, for a few seconds)...just wear gloves, keep a rag handy and be prepared to work quickly.