I'm absolutely in the same boat. Pre-lockdown it was 15k, each way, every day. I've really missed the regular routine and felt both physically and mentally down through the lack of movement/outside time.
During the summer it was a bit easier to get out at nosebleed-o-clock, but having had a number of crashes due to ice over the years I have no intention of doing that through the winter 'proper'. I have a turbo, but can only get motivated for intense sessions - the thought of riding at the same level as commuting just doesn't do it for me. Clear lunch breaks are few and far between, but also hard to get a ride into an hour while also making it feel worthwhile (for me that would be riding some quiet country roads, up hills, etc).
Running has been a poor substitute but ticked a box occasionally. Otherwise I've tried to focus on the positive aspects - being more present at home, spending the extra 2 hours a day with the kids, helping in the house, etc