We are much the same. Commando crawl when we want to get somewhere maybe one or two shuffles on all fours when playing. No real interest in standing but starting to pull up more. It really is hard not to compare and worry though.
My little one is commando crawling and has been for a month or two, but has now decided she would prefer to butt shuffle around. I’ve done a lot of little exercises to encourage crawling on all fours but she will just not have it. She is pulling herself up and standing, loves being ‘walked’ around but I don’t see her walking on her own anytime soon. My first was walking independently by this age and it’s so hard not to compare, but they really do just do it at their own pace/when they are ready. These physical milestones won’t even be a thought in a year’s time.
We’ve been commando crawling since 6 months and in maybe the last three weeks I’ve put Bub on the grass every day and she’s crawling properly. Still commando on tiles and to get somewhere quickly but grass and sand have helped.