Is this idiomatic sentence correct?
Solution 1:
It depends on what you are trying to say.
If you think that the lockdown gave you valued extra time then you can say
This is what the lockdown made of me.
The lockdown has allowed me to improve my French and learn to play guitar.
But if you want to say that you considered it wasted time, you can say
This is what the lockdown did to me.
I was so bored I even counted flies and stacked playing cards like dominoes.
(Not that I really want to make any value judgements).
In both examples, you can remove 'the' before 'lockdown'.