Not so long ago, in 2020 and 2021, a large proportion of our training was solo work due to the pandemic. In my training group, having a mixture of traditional and modern arts, we made significant gains despite not having training partners, which seems almost contradictory to most coaches.
Like most people, we used zoom sessions to stay in touch and to gain new technical and historical information. There was much more emphasis on using home gyms and making the most of what we all had. Some of us had to add rehabbing from a nasty bout of covid into the mix.
I found that having a home-heavy bag was beneficial and modified it to suit my needs. For example, I added small targets to the bag for my empty hand and weapons strikes. Below you can see me kicking the bag, trying to fix my lungs post covid.
I used the bag for the usual striking and tool training, but I also used it for post-workout resistance training to train my clinch and close-in tools, such as the head butts, which are a must-train for close combat. Some people think using a bag like this is funny, but I have to say I am really pleased with my enhanced clinch strength and especially when I was able to drop one detractor on his head. It was a bit like a knife cutting through butter, getting past his arms to gain control of his body.
I also use my bag during stick, sword and dagger training. I know people who hung some car tires to strike. A tennis ball on a rope can also be a valuable training tool.

Look around your home gym and think about how you can get in extra training sessions to safely improve your skills.
The world is our playground.