Oleandra wallichii (Hook.) C. Presl, Tent. Pterid. 78 1836. (syn: Aspidium wallichii Hook.; Neuronia asplenioides D.Don; Oleandra wallichii var. lepidota Christ);
Himalaya to China (Sichuan, Yunnan, Guangxi) and Indo-China, Taiwan: Assam, China South-Central, China Southeast, East Himalaya, Myanmar, Nepal, Taiwan, Thailand, Tibet, Vietnam, West Himalaya as per POWO;
India (Himachal Pradesh, Uttarakhand, Sikkim, Meghalaya, Arunachal Pradesh, Assam); Nepal; Bhutan; Myanmar (Kachin, Chin, etc.); China (Sichuan, Yunnan, Guangxi); Taiwan; Tibet; Vietnam; N-Thailand as per Catalogue of Life;

Oleandra wallichii (Hook.) Pr. : 7 posts by 1 author. 6 images- 4 to 6 mb each.
Location: Phulchoki, Lalitpur
Date: 07 October 2020 
Elevation: 2232m.
Habit : Wild

SK 2771 07 October 2020 – Fern : 13 posts by 3 authors. 4 images- 7 mb each.

Location: Nagarkot,  Kathmandu
Date: 12 September 2020
Elevation: 2044 m.
Habit : Wild 
Oleandra wallichii (Hook.) C.Presl ??

Sori and Rhizome characters are required

Not perfect image.
May also be juvinile Coniogramme or Diplazium javanicum or something else.

Thank you … but looks different both species suggested.

The well developed spores and rhizome could gave some clues. It is very young….could be similar species as suggested by …

But as of young leaf I will go with Oleandra wallichii (Hook.) C. Presl, if it is epiphytic than  Coniogramme or Diplazium, as it is common at that altitude in Central Nepal.

Looks different from Oleandra wallichii as per GBIF and FOC illustration

it seems to be young leaf frond of Oleandra wallichii.

Thank you … I shall follow-up for the maturity!.

Yes, there seems some similarity as per GBIF Specimens: