I hear you...
I'm a single mum of a 4 year old and have been since she was born, things that I decided to do when I was struggling with time.
I stopped bathing her every night, she has a wash and teeth brushed every night before bed but now twice a week she has a bath and one of those tends to be on a weekend...unless obviously filthy or she asks for one (she has a shower after swimming as well). Sometimes I'll shower while she's in the bath just to save myself a later job.
We also used to had to have frequent calls with my child's father, it was tricky when she was young as there was very little interaction and TBH she just wanted to watch TV...now we speak to him 2 or 3 times a week. Sometimes it's easier if he catches her on bath night as she is contained and has to engage a bit more.
On my WFH days I do a job whenever I go and boil the kettle...so wash the dishes, put them away, hang the washing, bring stuff upstairs.
I did an online shop and had it delivered on my WFH days as when she was smaller she hated going to the shops, now she actually likes going so we tend to go one evening after nursery
I invested in robot hoover that just goes round the house while I'm working.
I think with everything there are peaks and troughs, it doesn't help that you're tired, poorly and probably feeling a bit rotten from your period. At times like this just focus on the bear minimum and make sure you prioritise sleep over cleaning!
I am absolutely dreading when school starts as at least at nursery she's in from 7:45-5 which gives me about 30 minutes either end to get jobs done, get some exercise, over run at work. I fear once she's at school it will be work or parenting and no time for anything else. It's very easy to lose yourself!