Nope....bleach is bad...for septic systems :)
We have two systems....one is the old fashioned kind, the other is the newer (anaerobic system)....we add yeast packets to the old system, every so often.
Both have had recent service, so that’s a good thing.
I’d get more yeast, just in case. It will keep indefinitely in a ziploc bag in the freezer. I buy the big packs of it at SAMS because I do a lot of home baking.