To be fair, I don't know.So I've been thinking, instead of indicators, how about I not let you skip those sequences? In any case, most, if not all, of my sequences are pretty quick, so I don't think this is much of a hassle. What do you think?
You could make a test build with the same sequence occuring two times. The only difference would be how you imagine to handle those sequence and publish it to your patreons / discord users and have them vote on which way feels better in terms of experience (A/B Testing).
In this case you could have the first time the sequence play not skippable and the second time implement it an alternative way. In the end it's important you and later on the reader/player feels comfortable with it.