Same, did my first race today since April. I'm 87kg so 2kg heavier than then (mostly muscle as been at the gym daily pretty much), but extra weight isn't my friend when cycling

Lost the pack straight out the pen, don't have that top end power to sprint out yet. Managed to claw them back before turning into Titans. Where I was dropped as soon as the road went up!
Like you I then ended up with the odd rider from there all the way to the end. I was trying really hard to keep my watts above 200 average for the whole race which I just about managed. I was pleased with that as gives me a base at least to work from.
I was with 3 others at the sprint finish. I ramped up, hit 700 watts for probably 2 seconds, then totally blew up

I think I have a lot to work on over the winter to get some fitness back.
Great to see you back too