Firstly I’d say that while you’re lost in the trees of the current challenges, someone with your deep level of training and fitness will not lose much in the grand scheme of things when you restart training properly. As others have said I suspect you’ll be back at your pre-trauma numbers fairly quickly, and the more helpful aerobic activity you can do before then will only help.
Secondly, look for the possibility going forward. Maybe you wont be at quite the same pointy end this season, so could you re-focus your season on something else? Different types of events, different role in the team, different type of training to prep for 2023 or just something fun on a bike you haven’t done before? Maybe re-focus on what you enjoy about those events you already do - I bet you didnt start at the pointy end the first few years, so why did you do them in the first place, and why did you keep doing them when winning was never on the cards? Maybe try and reconnect with what you loved about the sport in the first place and let the focus on pure performance and results become very much secondary… Remember what put a smile on your face when you threw a leg over the bike.
I also think it really helps to try and stop comparing and FOMO when looking at your mates and competitors training. Really, who cares if they’re doing 100 mile base rides and you’re not. You can’t, so let it go. It’s easy for that FOMO to even spiral into resentment, so feel good for them and remember you’ll be back with them soon enough.
Good luck and speedy recovery.