If the school has been good and is understanding on this, could they give you a list of topics they'll cover this year? This may already be on the school's website - my DDs' school has a Curriculum page which this year has put up a 'long term plan' for each year group (possibly to help us parents when they get sent home...). This may help ease your concerns about returning and working on other things when you can see what her peers will be doing.
I think there could be benefits to a more relaxed style with a focus on core and exploring areas of interest while recovering from difficult school or other experiences. When we've had times of dialing it down, I broke things into 4 areas:
English & Communication: my DS1 is currently doing speech writing here with Toastmaster's Competent Communicator Manual, but also essay writing (Breakfast on Mars is a good book of age-approriate entertaining essays and they have a website with free lesson plans that goes with it), Pobble365 for other creative writing, I'd pick one and work on that, maybe bring in things like language techniques and grammar, and similar within that one area rather than trying to do lots of different ones. Additional language practice and if spelling is a weak area, SpellingCity with words she mispells can be good additions.
Numeracy & Technology: Corbett Maths could be a good free way to go light while also covering different areas & seeing what she knows and doesn't yet. We tend to do this alongside coding or ICT at this age (in primary, we do typing and basic ICT, if not a proficient touch typist - or she'd just like the challenge of learning to type faster I'd recommend typingclub).
Assigned Reading(s)/Reading time with fiction and non-fiction - I set something that they summarize and discuss with me afterwards and/or set a time with a reading lists we build together and they can pick from that during this time.
Plus Projects: Rotating through other areas of interest or curriculum throughout the week (So, Tuesday: Science with...) or doing one area for a set amount of time and then moving onto the next. Different topics and different kids work better in different ways of handling this.
If you get a topic list from the school, you can look for and through resources that cover the different areas together. You may find ways to cover things that she prefers to the school that can continue to be used when they return - during lockdown, my DD1 particularly appreciated using Religion for Breakfast (youtube channel) as a spark for discussion for RE with me over the worksheets provided.