It may be that she is yawning because she is bored with what is happening rather than tired, or the long time to fall asleep may be her normal, some babies do need long wind downs.
Given she's sick & going through a growth spurt, I'd roll with it... honestly parenting needs to be a lot of meeting in the middle of what we ideally would like & what our children are like and their needs.
As a "type A person" prior to children, the best thing that happened was when I worked out how to discard that persona and be a much more flexible person & it's paid off big time with having teenagers now.
I don’t want to create more work for when I start sleep training.
I think the place you are at could be from having the 21st Century style of "checklist" parenting, the problem is babies are "on a journey" kind of creatures. I think "sleep training" is what occurs when there is a really big habit that needs to be broken in a 9mo baby (eg feeding to sleep) but the reality is with younger babies, it's a pattern of slow changes that has its ups & downs. Some babies (Angel/Textbook) fall into the pattern faster than others, but they all get there.... it's like babies learning to walk, talk & then children learning to read etc... My DS1 was a shocking sleeper (even had sleep consultants) was a short napper until about 8mo & didn't sleep through the night until 4yo... yet we never ever had bedtime refusal. Also some children are walking at 8mo, others like my DH dont' walk until nearly 2yo, yet my DH was a State Distance runner... so mastering that skill late didn't hurt him. My point is that sometimes the longer it takes a child to get there may be a positive in terms of what we learn along the way rather than a negative because we aren't ticking that box off.
I personally think that not being able to read sleep cues in babies under 3mo is normal, because it's the time when "biologically" speaking mothers carried them around & they slept when they needed to, it's a westernised pattern that we want babies to sleep to a routine & because of that we get frustrated because "angel" babies can do it why can't all.. when the reality is the most of them are "normal" the angel ones are just easier.