If you have Ensembl IDs, you could consider using gget:

https://github.com/pachterlab/gget

Hi Shweta,
If you are referring to NCBI Gene IDs, you can use NCBI Datasets for that task. To download only gene sequences, you can use the following command:

datasets download gene gene-id --inputfile mylist.txt --include gene

This command will download a zip archive (ncbi_dataset.zip) with the gene sequences of the gene-ids in your list (mylist.txt in the example) plus metadata information about the genes as a JSON-Lines file (data_report.jsonl). Unzipping into a new folder will produce this result:

unzip ncbi_dataset.zip -d mygenes
Archive:  ncbi_dataset.zip
  inflating: mygenes/README.md       
  inflating: mygenes/ncbi_dataset/data/gene.fna  
  inflating: mygenes/ncbi_dataset/data/data_report.jsonl  
  inflating: mygenes/ncbi_dataset/data/dataset_catalog.json

One potential issue is that all genes will be in the same FASTA file (gene.fna). If you want each gene as a separate FASTA, you can loop over the list and download each gene-id as it's own data package:

cat mylist.txt | while read GENEID; do
  datasets download gene gene-id "${GENEID}" --include gene --filename "${GENEID}".zip;
done

I hope it helps!