Maybe Lymantrichneumon disparis?
https://www.galerie-insecte.org/galerie/Fam_Ichneumonidae_12.html

This specimen was looking for preys, I think, on a rockwall.
What it discovered was an Amaurobius spider, who disliked to be stalked and faced the intruder forcing the wasp to get away.
When it was really L. disparis, I imagine it prefers hunting more caterpillars than spiders...
Every confirm and information about this species will be welcome.
It was three - four meters away, I couldn't take better photos, sorry.

Monitoring activity with
@valchie

Reared from a Eumeninae mud nest (in the channel in the window frame, 5.4.2021), male found dead, female alive and freed (https://www.inaturalist.org/observations/78850594). 13.5.2021. Body length: 7.5 mm. Body stout.

HEAD: Apex of mandible simple. Mandible width: 6/42.9 mm=0.14 mm. WMM: WMB = 4.08 : 8.12 =0.50. [WMB: Width of mandible basally; WMM Lateral Width of mandible in its middle part]. First flagellomere short, F1: F2 = 8.01 px : 7.64 px= 1.048. Frontal carina nearly straight in dorsal view. Vertex narrow: POD : OOD [Post–ocellar distance : Oculo–ocellar distance = 9.63 px : 8.43 px = 1.14]. POD (Post–ocellar distance)=16/42.9=0.37 mm.

MESOSOMA: LPN (Length of pronotum laterally )=40/42.9=0.93 mm

LEGS: Posterior mid-tibial spur approximately 1.5 times as long as the anterior one.

METASOMA: Punctation of the second tergite coarse and dense, little decreasing in size toward its posterior margin. PT2 (largest punctures on the second tergite )= 4/42.9=0.09 mm. Punctation of the anterior half of the second tergite with smaller punctures than those of the first tergite; their diameter is less than twice of the punctures of the posterior half of the second tergite. WRB (width of apical rim of the third tergite basally)= 82/42.9=1.91 mm. Lateral surface of the second tergite with more or less dense large punctures with scattered minute punctation in the interspaces. The second sternite golden-green. Black spots of the second sternite long, extending beyond the mid of the sternite.

REMARKS: Determination following Mingo 1994 and Orlovskytė et al 2016. The formula (male) to key out C.parietis or C.ignita is:
1.34 LPN – 2.43 POD+3.79 PT2 – 0.943 WRB+1 =
1.34·0.93 – 2.43·0.37+3.79·0.09– 0.943·1.91 +1 =
0.21-0.91+0.09-1.80 +1= -1.41 (as it is <0 is Chrysis ignita)

https://forum.chrysis.net/viewtopic.php?f=8&t=51820&p=84621#p84621