Hey @Hajar!
In the future please just attach the QZV - these photos of your monitor are very difficult to read.
I took a look through and your demux seqs look good!
Okay, so it seems like your untrimmed reads through DADA2 seem reasonable.
With that out of the way, back to the main question:
No - why would you do this? I have been asking around and I haven't been able to figure out a reasonable workflow that would do this to your ASVs --- can you provide some context?
From what I see, you should be fine to proceed with your FeatureTable[Frequency] & FeatureData[Sequence] as-is, no trimming necessary...